Autonomous Noetherian boundary-value problem in the case of parametric resonance. Neliniini Kolyvannya, [S. l.], v. 23, n. 1, p. 134–144, 2020. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/982. Acesso em: 11 apr. 2026.