GAVRILYUK, I. P.; KLYMENKO, A. V.; MAKAROV, V. L.; ROSSOKHATA, N. O. FD-method for an eigenvalue problem with nonlinear potential. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 1, p. 14–28, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3289. Acesso em: 5 dec. 2025.