Maximum principle and existence of positive solutions for nonlinear systems involving degenerate p -Laplacian operators. Khafagy, Salah A.; Serag, Hassan M. — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
Existence of weak solutions for nonlinear systems involving several p -Laplacian operators. Khafagy, Salah A.; Serag, Hassan M. — 2009 Electronic Journal of Differential Equations (EJDE) [electronic only]