Seminonlinear matrix boundary-value problem in the case of a parametric resonance. Neliniini Kolyvannya, [S. l.], v. 19, n. 2, p. 276–289, 2016. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/830. Acesso em: 12 apr. 2026.