Ait Hammou, M., and E. H. Azroul. “Nonlinear Elliptic Problems in Weighted Variable Exponent Sobolev Spaces by Topological Degree”. Proyecciones (Antofagasta, On Line), vol. 38, no. 4, Oct. 2019, pp. 733-51, doi:10.22199/issn.0717-6279-2019-04-0048.