1.
Kuznietsova IV, Soroka YY. The first Betti numbers of orbits of Morse functions on surfaces. Ukr. Mat. Zhurn. [Internet]. 2021Feb.22 [cited 2024Apr.25];73(2):179 -200. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2383