1. Some necessary conditions for the class of languages accepted by the probabilistic automata with a time-variant-structure, Elektron. Informationsverarb. Kybernet. 17 (1981), 623 - 632
2. A new algorithm for solving discrete programming problems, Zh. Vyschisl. Mat. i Mat. Fiz. 21 (1981),329 - 338 (in Russian).
3. Integer solutions for some classes of systems of linear inequalities, Dokl. Acad. Nauk Ukrain. SSR, Ser. A, 1981, 13 - 15 (in Russian).
4. On a class of pseudodifferential operators of variable order, Doklady Akademii Nauk SSSR (1981), 1308 - 1312 (in Russian).
5. On a class of pseudodifferential operators of variable order, Tap chi Toan hoc 9 (1981), No3, 1 - 6 (in Vietnamese).
6. Version vectorielle d'un théorème de densité et ses applications aux problèmes de controle, C. R. Acad. Sci. Paris, Série A 293 (1981), 665 - 668
7. Some nonlinear programming problems and applications, Sci. Proceedings of NCSR, Hanoi 2 (1981), 2 - 7
8. Freie Auflosung eines flachen holonomen Systems und ihre Entfaltungen, Seminar-berichte Humboldt Univ. 39 (1981), 1 - 41
9. Singularités non dégénérées des systèmes de Gauss-Manin réticulés, Bull. Math. Soc. France, Mémoire, 6 (1981), 1 - 77
10. On the multivalued asymptotic martigales, Acta Math. Vietnam. 6 (1981), 77 - 87
11. Some results on locally Lipschitzian mappings, Acta Math. Vietnam. 6 (1981), 97-105
12. Functor of projective limit in Banach categories, Tap chi Toan hoc 9 (1981), 16 - 20 (in Vietnamese).
13. Some integral representations of xkyl-analytic functions and their inverse formulas, Diff. Urav. 17 (1981), 165 - 171
14. Integral representations of P-analytic functions with logarithmically harmonic character P, Diff. Urav. 17 (1981), 1668 - 1673
15. On the existence of positive eigenvectors for a class of concave operators, Funct. Anal. Ulianovsk 15 (1981), 33 - 43 (in Russian).
16. On the linear discrete games with integral constraints on controls, Dokl. Akad. Nauk Azerbaijan. SSR 37 (1981), 10 - 14 (in Russian).
17. On the linear discrete games with fixed times, Dokl. Akad. Nauk Azerbaijan. SSR 37 (1981), 4 - 7 (in Russian).
18. On the method of pursuit in linear differential games with different types of constraints on controls, Izv. Akad. Nauk Azerbaijan. SSR, Ser. Fiz.-Tekhn. Mat. Nauk 1981, 27 - 31 (in Russian).
19. On the class of all processes having a Riesz decomposition, Acta Math. Vietnam. 6 (1981), 101 - 107
20. Some examples and theorems related to the Radon-Nikodym property in Banach spaces, Acta Math. Vietnam. 6 (1981), 64 - 70
21. Measurable relations with closed ball values in Banach spaces, Acta Math. Vietnam. 6 (1981), 6 - 12
22. Representation and regularity of multivalued martingales, Acta Math. Vietnam. 6 (1981),29 - 40
23. On a dual series equation, Tạp chí Toán học 9 (1981), 15 - 21
24. Dương Trọng Nhân, Pair of nonlinear contraction mappings, common fixed points., Studia Univ. Babes-Bolyai Math. 16 (1981), 34 - 51
25. Nguyễn Tố Như, Nguyễn Văn Khuê, Extending locally Lipschitz maps with values in infinite dimensional Frechetz spaces, Bull. Acad. Polon. Sci. Ser. Sci. Math. 29 (1981), 609 - 616
26. Nguyễn Tố Như, Nguyễn Văn Khuê, Two extensors of metrics, Bull. Acad. Polon. Sci. Ser. Sci. Math. 29 (1981), 825 - 831
27. Nguyễn Tố Như, Nguyễn Văn Khuê, Lipschitz extensions and Lipschitz retractions in metric spaces, Colloq. Math. 45 (1981), 245 - 250
28. Vũ Ngọc Phát, Controllability problem of general nonlinear processes, Vietnam J. Math. 2 (1981), 27 - 31 (in Vietnamese).
29. Vũ Quốc Phóng, On inequalities for powers of linear operators and for quadratic forms, Proc. Roy. Soc. Edingburgh Set. A 89 (1981) 25 - 50
30. Hồ Đăng Phúc, Universal distribution for infinitely divisible distributions on Fréchet space, Ann. Inst. Poincaré Probab. Statist. 17 (1981), 219 - 227
31. Hồ Đăng Phúc, On the density of universal probability distributions on a Fréchet space, Acta Math. Vietnam. 6 (1981), 71 - 73
32. Phạm Hữu Sách, Inconsistency theory for inclusion systems and its applications to the control problems, Habilitation thesis, Moscow, 1981, 243 p (in Russian).
33. Nguyễn Khoa Sơn, Controllability of linear discrete-time systems with constrained controls in Banach spaces, Control and Cybern. 10 (1981), 5 - 16
34. Đỗ Hồng Tân, On probabilistic condensing mappings, Rev. Roumaine Math. Pures Appl. 26 (1981), 1305 - 1317
35. Nguyễn Xuân Tấn, Banach-Steinhaus theorems for multivalued mappings, Math. Nachr., 102 (1981), 157 - 169
36. Lê Văn Thiêm, On an expression for the velocity component in the Oseen regime, Tap chi Toan hoc 9 (1981), 10 - 16 (in Vietnamese).
37. Lê Văn Thiêm, Sur la vitesse d'ộcoulement plan en rộgime d'Oseen, (French) [Velocity of Oseen plane flow]., Acta Math. Vietnam. 6 (1981), 95 - 100 (in French).
38. Nguyễn Văn Thoại, Anwendung des Erweiterungsprinzips zur Loesung konkaver Optimierungs ausfgaben, Mathematische Operationsforschung und Statistik. Series Optimization 11 (1981), 45 - 51
39. Nguyễn Văn Thu, Limit theorems for random fields, Dissert. Math. Polish Academy of Sciences, CLXXX (1981), 422 - 462
40. Nguyễn Văn Thu, A new version of Doeblin's theorem, Ann. Inst. Henri Poincaré, XVII (1981), 213 - 217
41. Nguyễn Văn Thu, Stable type and completely self-decomposable prob measures on Banach spaces, Bull. Pol. Acad. Sci. XXIX (1981), 637 - 642
42. Nguyễn Hữu Trợ, The asymptotic law of the number of patients in a space-time region, Acta Math. Vietnam. 6 (1981), 92 - 96
43. Nguyễn Tự Cường, Ngô Việt Trung, Uber schwache Sequenzen, Period. Math. Hungar. 11 (1981), 77 - 80
44. Ngô Việt Trung, Der graduierte Ring bezuglich des Primideals von Macaulay, Beitr. Algebra Geometrie 11 (1981), 35 - 40
45. Ngô Việt Trung, A class of imperfect prime ideals having the equality of ordinary and symbolic powers, J. Math. Kyoto Univ. 21 (1981), 239 - 250
46. Ngô Việt Trung, A characterization of two dimensional unmixed local domains, Mathematical Proceedings of the Cambridge Philosophical Society 89 (1981), 237 - 239
47. Ngô Việt Trung, Principal systems of ideals., Acta Math Vietnam. 6 (1981), 57 - 63
48. Phan Văn Chương, Random version of the Kakutani-Ky Fan fixed point theorem, Journal of Mathematical Analysis and Applications, Volume 82, Issue 2, August 1981, Pages 473-490
49. Trần Mạnh Tuấn, On some programs of mathematical statistics, Thông báo Khoa học, Viện khoa học Việt Nam, 1981, No 1, 8 - 11 (in Vietnamese).
50. Trần Mạnh Tuấn, Some problems on the use of computers in the research on applying mathematical statistics in Vietnam, Ph.D. Thesis, Institute of Mathematics, Hanoi, 1981 (in Vietnamese).
51. Hoàng Tụy, On variable dimension algorithms and algorithms using primitive sets, Mathematische Operationsforschung und Statistik. Series Optimization 12 (1981), 361 - 381
52. Hoàng Tụy, A fixed point theorem involving a hybrid inwardness-contraction condition, Math. Nachr. 102 (1981), 271 - 275
53. Hoàng Tụy, N. Q. Thai, Minimizing a concave function over a compact convex set, In: Proceedings of the Conference on Optimization, Vitte/Hiddensee, May 1981, 15 - 20
54. Hoàng Tụy, Conical algorithm for solving a class of complementarity problems, Acta Math. Vietnam. 6 (1981), 3 - 17
55. Đào Quang Tuyến, On the assymptotic behaviours of sequences of random variables, Annales de l’Institut Henri Poincare, Section B, XVII (1981), 63 - 73
56. Đỗ Long Vân, Problème des mots et de conjugaison pour une classe de groupes de présentation finie, C. R. Acad. Sci. Paris, Série I 292 (1981),773 - 776
57. Trần Đức Vân, On solvability of mixed problem for parabolic equations of infinite order, Trudy of Sobolev seminars, Novosibirsk, 2 (1981), 124 - 130
58. Nguyễn Tự Cường, Trivialite des deploiements de reseaux holomoes. Bull. Math, France Memoire 6 (1981), 78 - 85
59. Hồ Đăng Phúc, Nguyễn Văn Thu, Universal random distribution, Vietnam. J. Math. 9 (1981), 1-4