Hladysh BI, Prishlyak OO. Deformations in the general position of the optimal functions on oriented surfaces with boundary. Ukr. Mat. Zhurn. [Internet]. 2019Aug.25 [cited 2024Apr.19];71(8):1028-39. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1495