Existence of stable periodic solutions for quasilinear parabolic problems in the presence of well-ordered lower and upper-solutions. El Hachimi, Abderrahmane; Alaoui, Abdelilah Lamrani — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]
Time periodic solutions to a nonhomogeneous Dirichlet periodic problem. El Hachimi, Abderrahmane; Alaoui, Abdelilah Lamrani — 2008 Applied Mathematics E-Notes [electronic only]