Multiple solutions to a nonlinear elliptic equation involving Paneitz type operators. El Hamidi, Abdallah — 2004 International Journal of Mathematics and Mathematical Sciences
Nonexistence results of solutions to systems of semilinear differential inequalities on the Heisenberg group. El Hamidi, Abdallah; Kirane, Mokhtar — 2004 Abstract and Applied Analysis
Nonexistence of solutions to systems of higher-order semilinear inequalities in cone-like domains. El Hamidi, Abdallah; Laptev, Gennady G. — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]
On combined asymptotic expansions in singular perturbations. Benoît, Eric; El Hamidi, Abdallah; Fruchard, Augustin — 2002 Electronic Journal of Differential Equations (EJDE) [electronic only]