SELMA HADJER DJEFFAL; LAMINE BOUZETTOUTA; ZOUBIDA MARSA. EXISTENCE AND NO EXISTENCE OF POSITIVE SOLUTIONS FOR ROBIN (P,Q)-LAPLACE EQUATION WITH TWO PARAMETERS. Utilitas Mathematica , [S. l.], v. 122, n. 1, p. 1794–1805, 2025. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/2428. Acesso em: 7 may. 2026.