Hladysh, B. I. and Prishlyak, O. O. (2016) “Functions with nondegenerate critical points on the boundary of the surface”, Ukrains’kyi Matematychnyi Zhurnal, 68(1), pp. 28-37. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1819 (Accessed: 29March2024).