Hernández GE, Choi YS. Existence and multiplicity of solutions for systems of semilinear elliptic equations. Proyecciones (Antofagasta, On line) [Internet]. 2018Apr.4 [cited 2024Apr.29];15(1):1-17. Available from: https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/2700