Determination of the boundaries between the domains of stability and instability for the Hill’s equation. Neliniini Kolyvannya, [S. l.], v. 6, n. 1, p. 42–51, 2003. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/247. Acesso em: 22 jan. 2026.