BARBU, Lumini¸ta; MOROȘANU, Gheorghe. On eigenvalue problems governed by the (p, q)-Laplacian. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 68, n. 1, p. 63–76, 2023. DOI: 10.24193/subbmath.2023.1.05. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/4925. Acesso em: 10 feb. 2025.