### Dinh Nho Hao

Full Professor, Doctor of Science
Department of Differential Equations
Inverse problems and ill-posed problems |

**Address**

Office: Building A5, Room 305

Tel: +84 24 37563474 / 305

Email: hao AT math.ac.vn

Personal homepage: https://sites.google.com/view/dinhnhohao/

*Education and academic degrees*

- Bachelor/Master: 1978-1983, ĐHTH Baku, Azerbaijan
- PhD.: 1991, Freie Universität Berlin, Germany
- Doctor of Science: 1996, Universität Siegen, Germany
- Professor: 2003
- Full Professor: 2009

*Research areas:* partial differential equations, inverse and ill-posed problems in partial differential equations, optimal control, image processing, numerical analysis

* *

**Member of the Editorial Board**

- Acta Mathematica Vietnamica: 2002-2007; since 2007: Deputy Editor-in-Chief
- Applicable Analyis, 2018 -

- Applied Numerical Mathematics, 2010 -

- Vietnam Journal of Mathematics, 2011 --
- Vietnam Journal of Mathematical Applications, 2011 --

** **

**PUBLICATIONS**

List of publications in MathSciNet

List of publications in MathSciNet

*List of recent publications*1 | Dinh Nho Hao, Akhtar A. Khan, Simeon Reich, Convergence rates for nonlinear inverse problems of parameter identification using Bregman distances, Journal of Nonlinear and Variational Analysis, 7 (2023), 715-726, (SCI-E, Scopus). |

2 | Dinh Nho Hao, Nguyen Van Duc, Nguyen Thi Ngoc Oanh, Stability results for weak solutions to backward one-dimensional semi-linear parabolic equations with locally Lipschitz source. Journal of Inverse and Ill-Posed Problems 29 (2021), no. 4, 499–513, SCI(-E); Scopus. |

3 | Dinh Nho Hao, Tran Nhan Tam Quyen, Nguyen Thanh Son , Convergence Analysis of a Crank–Nicolson Galerkin Method for an Inverse Source Problem for Parabolic Equations with Boundary Observations. Applied Mathematics and Optimization. 84 (2021), 2289-2325, SCI(-E); Scopus. |

4 | M. Alosaimi, D. Lesnic, Dinh Nho Hao, Identification of the forcing term in hyperbolic equations. International Journal of Computer Mathematics. 98(2021), 1877-1891, SCI(-E); Scopus. |

5 | Dinh Nho Hao, Nguyen Van Duc, Nguyen Trung Thanh, Nguyen Van Thang, Regularization of backward time-fractional parabolic equations by Sobolev-type equations, Journal of Inverse and Ill-Posed Problems 28 (2020), 659-676. (SCI-E, Scopus). |

6 | Dinh Nho Hao, Phan Xuan Thanh, B. Bin-Mohsin, Nguyen Huu Cong, Stable reconstruction of the initial condition in parabolic equations from boundary observations. Computers & Mathematics with Applications. 79 (2020), 3570–3587,(SCI(-E); Scopus). |

7 | Nguyen Thuong Huyen, Dinh Nho Hao, Peter Maass, Lucio Colombi Ciacchi, Mathematical aspects of catalyst positioning in Lithium/air batteries. Inverse Problems 36(2020), SCI(-E); Scopus. |

8 | Dinh Nho Hao, Jijun Liu, Nguyen Van Duc, Nguyen Van Thang, Stability results for backward time-fractional parabolic equations. Inverse Problems 35 (2019), SCI(-E); Scopus |

9 | Dinh Nho Hao, A. A. Khan, M. Sama and C. Tammer, Inverse problems in variational inequalities by minimizing energy, Pure Applied Functional Analysis 4 (2019), 247–269. |

10 | Dinh Nho Hao, Le Thi Thu Giang, Sergey Kabanikhin, Maxim Shishlenin, A finite difference method for the very weak solution to a Cauchy problem for an elliptic equation, Journal of Inverse and Ill-Posed Problems, 28 (2018), 835 – 857, SCI(-E), Scopus. |

11 | Pham Quy Muoi, Dinh Nho Hao, SK Sahoo, D Tang, Cuong Dang, Nguyen Huu Cong, Inverse Problems with Nonnegative and Sparse Solutions: Algorithms and Application to the Phase Retrieval Problem, Inverse Problems, 34 (2018), 21 pages, SCI(-E); Scopus. |

12 | Dinh Nho Hao, Nguyen Van Duc, Nguyen Van Thang, Backward semi-linear parabolic equations with time-dependent coefficients and locally Lipschitz source, Inverse Problems, 34 (2018), 33 pages, SCI(-E); Scopus. |

13 | Dinh Nho Hao, Nguyen Thi Ngoc Oanh, Determination of the initial condition in parabolic equations from integral observations, Inverse Problems in Science and Engineering, 25 (2017), 1138--1167. |

14 | N.Y. Aksoy, Dinh Nho Hao, G. Yagubov, Finite Difference Method for an Optimal Control Problem for a nonlinear Schro"dinger equation, Numerical Functional Analysis and Optimization, 38 (2017), 799-817, SCI(-E); Scopus. |

15 | Dinh Nho Hao, Bui Viet Huong, Nguyen Thi Ngoc Oanh, Phan Xuan Thanh, Determination of a term in the right-hand side of parabolic equations, Journal of Computational and Applied Mathematics, 309 (2017), 28–43, (SCI-E); Scopus. |

16 | Dinh Nho Hao, Nguyen Thi Ngoc Oanh, Determination of the initial condition in parabolic equations from boundary observations. Journal of Inverse and Ill-posed Problems, 24 (2016), 195–220, SCI(-E); Scopus. |

17 | Pham Quy Muoi, Dinh Nho Hao, Peter Maass, Michael Pidcock, Descent gradient methods for nonsmooth minimization problems in ill-posed problems, Journal of Computational and Applied Mathematics, 298 (2016), 105–122, SCI(-E); Scopus. |

18 | Dinh Nho Hao, Bui Viet Huong, Phan Xuan Thanh, D. Lesnic, Identification of nonlinear heat transfer laws from boundary observations. Applicable Analysis, 94 (2015), 1784–1799, SCI(-E); Scopus. |

19 | Dinh Nho Hao, Nguyen Van Duc, A non-local boundary value problem method for semi-linear parabolic equations backward in time. Appl. Anal. 94 (2015), 446-463, SCI(-E), Scopus. |

20 | Dinh Nho Hao, Nguyen Van Duc and Nguyen Van Thang, Stability estimates for Burgers-type equations. J. Inverse Ill-Posed Probl. 23(2015), 41-49, SCI(-E), Scopus. |

21 | Dinh Nho Hao, Phan Xuan Thanh and D. Lesnic, Determination of the ambient temperature in transient heat conduction. IMA J. Appl. Math. 80(2015), 24-46, SCI(-E), Scopus. |

22 | Dinh Nho Hao, Tran Nhan Tam Quyen, Finite element methods for coefficient identification in an elliptic equation. Applicable Analysis 93 (2014), 1533–1566, SCI(-E), Scopus. |

23 | Dinh Nho Hao, Phan Xuan Thanh, Lesnic, D., Ivanchov, M, Determination of a source in the heat equation from integral observations. Journal of Computational and Applied Mathematics 264 (2014), 82–98, SCI(-E); Scopus. |

24 | Dinh Nho Hao, Phan Xuan Thanh and D. Lesnic, Determination of the heat transfer coefficients in transient heat conduction, Inverse Problems, 9 (2013), SCI(-E); Scopus. |

25 | Dinh Nho Hao, Pham Quy Muoi, Peter Maass and Michael Pidcock, Semismooth Newton and quasi-Newton methods in weighted $\ell ^{1}$-regularization, Journal of Inverse and Ill-posed Problems, 21 (2013), 665 - 693, SCI(-E); Scopus. |

26 | Dinh Nho Hao, La Huu Chuong, D. Lesnic, Heuristic regularization methods for numerical differentiation Computers & Mathematics with Applications, 63 (2012), 816 -- 826, SCI(-E); Scopus. |

27 | Dinh Nho Hao, Phan Xuan Thanh, D. Lesnic and B. T. Johansson, A boundary element method for a multi-dimensionalinverse heat conduction problem, International Journal of Computer Mathematics, 89 (2012), 1540 -- 1554, SCI(-E); Scopus. |

28 | Dinh Nho Hao, Tran Nhan Tam Quyen, Convergence rates for total variation regularization of coefficient identification problems in elliptic equations II, Journal of Mathematical Analysis and Applications, 388 (2012), 593 --616 SCI(-E); Scopus. |

29 | Dinh Nho Hao, Tran Nhan Tam Quyen, Convergence rates for Tikhonov regularization of a two-coefficient identification problem in an elliptic boundary value problem, Numerische Mathematik, 120 (2012), 45 -- 77 SCI(-E); Scopus. |

30 | Dinh Nho Hao, Nguyen Van Duc, Regularization of backward parabolic equations in Banach spaces, Journal of Inverse and Ill-posed Problems. 20 (2012), 745 - 763, SCI(-E); Scopus. |

31 | Dinh Nho Hao, N. T. Thanh and H. Sahli, Detection and characterization of buried landmines using infrared thermography, Inverse Problems in Science and Engineering 19 (2011), 281 -- 307, SCI(-E); Scopus. |

32 | Dinh Nho Hao, N. T. Thanh and H. Sahli, Passive infrared technique for buried object detection and classification. In: The 8th IEEE Workshop on Object Tracking and Classification Beyond the Visible Spectrum, 2011, DOI: 10.1109/CVPRW.2011.5981879, (ISBN: 978-1-4577-0529-8). |

33 | Dinh Nho Hao, N. T. Thanh and H. Sahli, Thermal infrared technique for landmine detection: Mathematical formulation and methods, Acta Mathematica Vietnamica 36 (2011), 469 -- 504, Scopus. |

34 | Dinh Nho Hao, T. N. T. Quyen, Convergence rates for total variation regularization of coefficient identification problems in elliptic equations I, Inverse Problems 27 (2011), 075008, 28pp, SCI(-E); Scopus. |

35 | Dinh Nho Hao, N. V. Duc, Stability results for backward parabolic equations with time-dependent coefficients, Inverse Problems 27 (2011), 025003, 20pp, SCI(-E); Scopus. |

36 | Dinh Nho Hao, Pham Minh Hien, T. Johansson and D. Lesnic, A variational method for a Cauchy problem for elliptic equations, Journal of Algorithms and Computational Technology, 4 (2010), 89 -- 119, Scopus. |

37 | Dinh Nho Hao, T. N. T. Quyen, Convergence rates for Tikhonov regularization of coefficient identification problems in Laplace-type equations, Inverse Problems, 26 (2010), 23p, SCI(-E); Scopus. |

38 | Dinh Nho Hao, N. V. Duc and D. Lesnic, Regularization of parabolic equations backward in time by a non-local boundary value problem method, IMA Journal of Applied Mathematics, 75 (2010), 291 -- 315, SCI(-E); Scopus. |

39 | Nguyễn Trung Thành, Dinh Nho Hao, H Sahli, Infrared thermography for landmine detection. In R. Hammoud (Editor). Applied Perception in Thermal-Infrared Imagery. Springer – Verlag 2009, 3 - 36. |

40 | Dinh Nho Hao, M. Alrefaya, H.Sahli and I. Vanhamel, A nonlinear probabilistic curvature motion filter for positron emission tomography images, Lecture Notes in Computer Science, 5567 (2009), 212-223. |

41 | Dinh Nho Hao, Nguyễn Trung Thành and H. Sahli, Splitting-based conjugate gradient for a multi-dimensional inverse heat conduction problem, Journal of Computational and Applied Mathematics, 232 (2009), 361-377. |

42 | Dinh Nho Hao, Nguyen Van Duc and D. Lesni, A non-local boundary value problem method for the Cauchy problem for elliptic equations, Inverse Problems, 25 (2009), 055002, 27pp. |

43 | Dinh Nho Hao, Nguyen Van Duc, Stability results for the heat equation backward in time, Journal of Mathematical Analysis and Applications, 353 (2009), 627-641. |

44 | Nguyễn Trung Thành, H Sahli, Dinh Nho Hao, Infrared thermography for buried landmine detection: inverse problem setting. IEEE Trans. Geoscience and Remote Sensing 46 (2008), 3977 - 4004. |

45 | Dinh Nho Hao, Nguyễn Trung Thành, H Sahli, Numerical solution of multi-dimensional inverse heat conduction problem by a splitting-based conjugate gradient method, Journal of Physics: Conference Series 135 (2008), 1 – 8. |

46 | Dinh Nho Hao, N. V. Duc and H. Sahli, A non-local boundary value problem method for parabolic equations backward in time, J. Math. Anal. Appl. 345 (2008), 805 - 815. |

47 | N. T. Thanh, H. Sahli, Dinh Nho Hao, Estimation of piecewise constant coefficients of parabolic equations: applications to the detection of buried objects, Inverse Probl. Sci. Eng. 16 (2008), 903 - 925. |

48 | Nguyễn Trung Thành, H Sahli, Dinh Nho Hao, Finite difference methods and validity of a thermal model for landmine detection with soil property estimation. IEEE Trans. Geoscience and Remote Sensing 45 (2007), 656 - 674. |

49 | Dinh Nho Hao, Pham Minh Hien and H Sahli, Stability results for a Cauchy problem for an elliptic equation, Inverse Problems 23 (2007), N0 1, 421 - 461. |

50 | H.-J. Reinhardt, Dinh Nho Hao, J. Frohne, F.-T. Suttmeier, Numerical solution of inverse heat conduction problems in two spatial dimensions, J. Inverse Ill-Posed Probl. 15 (2007), 181 - 198. |

51 | Dinh Nho Hao, N. T. Thanh and H. Sahli, Numerical solution to a non-linear parabolic boundary control problem. In: Advances in deterministic and stochastic analysis, 115 - 129, World Sci. Publ., Hackensack, NJ, 2007. |

52 | L. X. Yang, Dinh Nho Hao, and H. Sahli, Motion estimation by hybrid diffusion: theory and implementation, J. Inverse Ill-Posed Probl. 14 (2006), 307 - 330. |

53 | Dinh Nho Hao, H. Sahli, Stable analytic continuation by mollification and the fast Fourier transform. In: Methods of complex and Clifford analysis, 143 - 152, SAS Int. Publ., Delhi, 2004. |

54 | Dinh Nho Hao, H. Sahli, On a class of severely ill-posed problems, Vietnam J. Math. 32 (2004), Special Issue, 143 - 152. |

55 | Dinh Nho Hao, L. Van Kempen, G. Hislop, T. Tang and H. Sahli, A comparison of GPR reconstruction techniques. In: The tenth International Conference on Ground Penetrating Radar (GPR 2004), 345 - 348, Delft, The Netherlands, 2004. |

56 | Dinh Nho Hao, H.-J. Reinhardt, A generalization of Beck's method for inverse heat conduction problems. In: Abstract and applied analysis, 287 - 303, World Sci. Publishing, River Edge, NJ, 2004. |

57 | Dinh Nho Hao, A variational method for a domain identification problem for a parabolic equation. In: Abstract and applied analysis, 125 - 138, World Sci. Publishing, River Edge, NJ, 2004. |

58 | Le Thi Hoai, Pham Dinh, Dinh Nho Hao, An, Tao, On the ill-posedness of the trust region subproblem, J. Inverse Ill-Posed Probl. 11 (2003), 545 - 577. |

59 | Dinh Nho Hao, Pham Minh Hien, Stability results for the Cauchy problem for the Laplace equation in a strip, Inverse Problems 19 (2003), 833 - 844. |

60 | Le Thi Hoai An, Pham Dinh Tao, Dinh Nho Hao, Solving an inverse problem for an elliptic equation by d.c. programming, J. Global Optim. 25 (2003), 407 - 423. |

61 | L. T. H. An, P. D. Tao, Dinh Nho Hao, Towards Tikhonov regularization of non-linear ill-posed problems: a dc programming approach, C. R. Math. Acad. Sci. Paris 335 (2002), 1073 - 1078. |

62 | L. Marin, Dinh Nho Hao, D. Lesnic, Conjugate gradient-boundary element method for the Cauchy problem in elasticity, Quart. J. Mech. Appl. Math. 55 (2002), 227 - 247. |

63 | Dinh Nho Hao, H.-J. Reinhardt, A. Schneider, Numerical solution to a sideways parabolic equation, Internat. J. Numer. Methods Engrg. 50 (2001), N0 5, 1253 - 1267. |

64 | Dinh Nho Hao, M. T. Thu, Stability results for fractional differentiation. Appl. Anal. 76 (2000), 249 - 260. |

65 | Dinh Nho Hao, D. Lesnic, The Cauchy problem for Laplace's equation via the conjugate gradient method. IMA J. Appl. Math. 65 (2000), 199 - 217. |

66 | Hans Jürgen Reinhardt, Houde Han, Dinh Nho Hao, Stability and regularization of a discrete approximation to the Cauchy problem for Laplace's equation. SIAM J. Numer. Anal. 36 (1999), 890 - 905. |

67 | Dinh Nho Hao, H.-J. Reinhardt and Y. Jarny, A variational method for multi-dimensional inverse heat conduction problems. Matimyas Matematika August 1998, 48 - 56. |

68 | Dinh Nho Hao, H.-J. Reinhardt, Gradient methods for inverse heat conduction problems. Inverse Problems in Engineering 6 (1998), 177 - 211. |

69 | Dinh Nho Hao, Methods for inverse heat conduction problems. 249 pages. Peter Lang, Frankfurt am Main - Bern - New York - Paris, 1998. |

70 | Dinh Nho Hao, H.-J. Reinhardt, On the numerical solution of inverse heat conduction problems by gradient methods. In: Theory and Practice ASME, D. Delaunay, Y. Jarny, K. A. Woodbury (eds.), Inverse Problems in Engineering. New York, 1998, 385 - 392. |

71 | Dinh Nho Hao, H.-J. Reinhardt, On a sideways parabolic equation. Inverse Problems 13 (1997), 297 - 309. |

72 | Dinh Nho Hao, A mollification method for a noncharacteristic Cauchy problem for a parabolic equation. J. Math. Anal. Appl. 199 (1996), 873 - 909. |

73 | Dinh Nho Hao, H.-J. Reinhardt, Recent contributions to linear inverse heat conduction problems. J. Inverse and Ill-Posed Problems 4 (1996), 23 - 32. |

74 | H.-J. Reinhardt, Dinh Nho Hao, A sequential conjugate gradient method for the stable numerical solution to inverse heat conduction problems. Inverse Problems in Engineering 2 (1996), 263 - 272. |

75 | Dinh Nho Hao, Introduction to partial differential equations. University of Siegen, Summer 1996, 106 pages. |

76 | Dinh Nho Hao, H.-J. Reinhardt, Stable numerical solution to linear inverse heat conduction problems by the conjugate gradient methods. J. Inverse and Ill-Posed Problems 3 (1995), 447 - 467. |

77 | Dinh Nho Hao, A Schneiders and H -J Reinhardt, Regularization of a noncharacteristic Cauchy problem for a parabolic equation. Inverse Problems 11 (1995), 1247 - 1263. |

78 | Dinh Nho Hao, H.-J. Reinhardt and A. Schneider, Stable approximation of fractional derivatives of rough functions. BIT 35 (1995), 488 - 503. |

79 | Dinh Nho Hao, Determination of a coefficient in an elliptic partial differential equation. J. Inverse and Ill-Posed Problems 3 (1995), 11 - 20. |

80 | Dinh Nho Hao, On some linear inverse heat conduction problems. SEA Bull. Math. 19 (1995), 51 - 58. |

81 | Dinh Nho Hao, HJ Reinhardt, Efficient numerical solution to inverse heat conduction problems. In: Proceedings of the 1995 Design Engineering Technical Conferences, Vol. 3 - Part C, ASME, New York, 1995, 917 - 922. |

82 | Dinh Nho Hao, Stability results on a non-characteristic Cauchy problem for a parabolic equation. In: Proceedings of inverse Problems with Applications to Geophysics, Industry, Medicine and Technology. Ho Chi Minh City Math. Consortium 1995, 71 - 82. |

83 | Dinh Nho Hao, A noncharacteristic Cauchy problem for linear parabolic equations I: solvability. Math. Nachr. 171 (1995), 177 - 206. |

84 | Dinh Nho Hao, H.-J. Reinhardt, Towards linear inverse heat conduction problems. In: Proceedings of the HERMIS 1994. Hellenic Math. Soc. Athens 1994, 101 - 110. |

85 | Dinh Nho Hao, H.-J. Reinhardt and F. Seiffarth, Approximate solutions of illposed Cauchy problems for parabolic equations. In: FOMAAS, H. A. Eschenauer et al. (eds.) Fortschrittsbericht 1992-1994, University of Siegen- 1994, 126 - 144. |

86 | H.-J. Reinhardt, Dinh Nho Hao, Sequential approximation to nonlinear inverse heat conduction problems. Math. Comput. Modelling 20 (1994), 189 - 200. |

87 | Dinh Nho Hao, H. -J. Reinhardt & F. Seiffarth, Stable fractional numerical differentiation by mollification. Numer. Funct. Anal. Optim. 15 (1994), 635 - 659. |

88 | Dinh Nho Hao, A mollification method for ill-posed problems. Numer. Math. 68 (1994), 469 - 506. |

89 | Dinh Nho Hao, A noncharacteristic Cauchy problem for linear parabolic equations and related inverse problems I: solvability. Inverse Problems 10 (1994), 295 - 315. |

90 | Tran Duc Van, Dinh Nho Hao, Differential operators of infinite order with real arguments and their applications, World Scientific Publishing Co., Inc., River Edge, NJ, 240 pages, 1994. |

91 | Dinh Nho Hao, A noncharacteristic Cauchy problem for linear parabolic equations and related inverse problems II: a variational method. Pitman Res. Notes in Maths 263 (1992), 43 - 56. |

92 | Dinh Nho Hao, A noncharacteristic Cauchy problem for linear parabolic equations III: a variational method and its approximation schemes. Numer. Funct. Anal. Optim. 13 (1992), 565 - 583. |

93 | Dinh Nho Hao, A noncharacteristic Cauchy problem for linear parabolic equations II: a variational method. Numer. Funct. Anal. Optim. 13 (1992), 541 - 564. |

94 | Dinh Nho Hao, Regularization of a noncharacteristic Cauchy problem for the heat equation. Math. Methods Appl. Sci. 15 (1992), 537 - 545. |

95 | Dinh Nho Hao, T. D. Van and R. Gorenflo, Towards the Cauchy problem for the Laplace equation. Banach Center Publ. 27 (1992), 111 - 128. |

96 | Tran Duc Van, Dinh Nho Hao, Pseudodifferential operators with real analytic symbols and approximation methods for pseudodifferential equations. Math. Methods Appl. Sci. 15 (1992), 239 - 264. |

97 | Tran Duc Van, Dinh Nho Hao, Trinh Ngoc Minh, Rudolf Gorenflo, On the Cauchy problems for systems of partial differential equations with a distinguished variable. Numer. Funct. Anal. Optim. 12 (1991), 213 - 236. |

98 | Dinh Nho Hao, Gorenflo, R., A noncharacteristic Cauchy problem for the heat equation. Acta Appl. Math. 24 (1991), 1 - 27. |

99 | Dinh Nho Hao, Gorenflo, R., An ill-posed problem for the heat equation. Z. Angew. Math. Mech. 71 (1991), 759 - 762. |

100 | Dinh Nho Hao, Tran Duc Van and R. Gorenflo, Approximating the solution to the Cauchy problem and the boundary value problem for the Laplace equation. In: Theory and Practice of Geophysical Data Inversion (eds.: A. Vogel et al.), Vieweg & Sohn, Braunschweig/Wiesbaden, 1990, 35 - 48. |

101 | Dinh Nho Hao, Notes on the Benjamin-Bona-Mahony equation. Appl. Anal. 35 (1990), 221 - 246. |

102 | Dinh Nho Hao, Notes on a nonlinear dispersive equation. Z. angew. Math. Mech. 70 (1990), 627 - 628. |

103 | Dinh Nho Hao, Finite difference method for an optimal control problem of quantum processes. Acta Math. Vietnam. 14 (1989), 3 - 11. |

104 | Dinh Nho Hao, Approximating an optimal control problem of quantum processes by the finite element method. Acta Math. Vietnam. 12 (1987), 135 - 146. |

105 | Dinh Nho Hao, Optimal control of quantum processes. Avtomatika i Telemechanika 2 (1986), 14 - 21. Eng. Transl.: "Automat. Remote Control" 47 (1986), N0 2, 162 - 168 (in Russian). |

106 | Dinh Nho Hao, On a control problem for the Schrodinger equation. In: "Numerical Methods and Computers", M. M. Gasimov and A. D. Iskenderov (eds.), Baku State Univ. Press, 1982, 58-63 (in Russian). |

*Preprints*1 | IMH20230901, Dinh Nho Hao, Le Thi Thu Giang, Nguyen Thi Ngoc Oanh, Determination of the right-hand side in elliptic equations. |