Công bố năm 2007
1. Hoàng Xuân Phú, On Efficient Sets in $\mathbb R^2$, Vietnam Journal of Mathematics, Vol. 33, No. 4, pp. 463-468, 2005
2. Hoàng Xuân Phú, Some Properties of Solution Sets to Nonconvex Quadratic Programming Problems, Optimization, Vol. 56, No. 3, pp. 369-383, 2007
3. Hoàng Xuân Phú, Outer γ-Convexity and Inner γ-Convexity of Disturbed Functions, Vietnam Journal of Mathematics, Vol. 35, No. 1, pp. 107-119, 2007
