PUCCI, Patrizia. Multiple solutions for eigenvalue problems involving the (p, q)–Laplacian. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 68, n. 1, p. 93–108, 2023. DOI: 10.24193/subbmath.2023.1.07. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/4928. Acesso em: 5 feb. 2025.