Generalization of some inequalities for the gamma function. Ngoc, Ngo Phuoc Nguyen; Van Vinh, Nguyen; Hien, Pham Thi Thao — 2009 International Journal of Open Problems in Computer Science and Mathematics. IJOPCM
Representation of semigroups by products of topological spaces with prescribed cardinal functions Nguyen Van Vinh — 1983 Commentationes Mathematicae Universitatis Carolinae