Nontrivial solutions for nonlinear elliptic problems via Morse theory. Ayoujil, Abdesslem; El Amrouss, Abdel R. — 2006 Electronic Journal of Differential Equations (EJDE) [electronic only]
Continuous spectrum of a fourth order nonhomogeneous elliptic equation with variable exponent. Ayoujil, Abdesslem; El Amrouss, Abdel Rachid — 2011 Electronic Journal of Differential Equations (EJDE) [electronic only]