Temar, Bahia, Ouiza Saifi, and Smail Djebali. 2021. “A System of Nonlinear Fractional BVPs With ϕ-Laplacian Operators and Nonlocal Conditions”. Proyecciones (Antofagasta, On Line) 40 (2):447-79. https://doi.org/10.22199/issn.0717-6279-2021-02-0027.