Existence of weak solutions for a class of systems semilinear elliptics. Pesquimat, [S. l.], v. 21, n. 1, p. 23–34, 2018. DOI: 10.15381/pes.v21i1.15078. Disponível em: https://revistasinvestigacion.unmsm.edu.pe/index.php/matema/article/view/15078.. Acesso em: 17 jul. 2024.