Singular nonlinear eigenvalue problem for second order differential equation with energy dissipation. Neliniini Kolyvannya, [S. l.], v. 5, n. 3, p. 346–368, 2002. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/226. Acesso em: 22 jan. 2026.