VETRO, Calogero. A short review on (p,q)-equations with Carathéodory perturbation. Modern Mathematical Methods, [S. l.], v. 2, n. 2, p. 65–79, 2024. Disponível em: https://modernmathmeth.com/index.php/pub/article/view/33. Acesso em: 21 jun. 2024.