Bondar’O. P. (1993) “On the number of critical submanifolds of a function on a manifold”, Ukrains’kyi Matematychnyi Zhurnal, 45(12), pp. 1702–1705. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5979 (Accessed: 24November2024).