POTAPENKO, I. V. Leiko Network on the Surfaces in the Euclidean Space $E_3$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 6, p. 820–828, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2024. Acesso em: 5 dec. 2025.