DJEFFAL, S. H.; BENSELHOUB, A. Research of the Fučik spectrum for the (p,q)-Laplacian operator by min-max theory. Technology audit and production reserves, [S. l.], v. 3, n. 2(71), p. 30–35, 2023. DOI: 10.15587/2706-5448.2023.277565. Disponível em: https://journals.uran.ua/tarp/article/view/277565. Acesso em: 2 jun. 2024.