BELIOVSKAYA, L.; BOGOMOLOV, N.; KOVALEV, A. Construction of isoline maps of functions of two variables. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 1, n. 1, p. 15–23, 2000. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/10. Acesso em: 28 apr. 2024.