Remarks on a class of quasilinear elliptic systems involving the ( p , q ) -Laplacian. Zhang, Guoqing, Liu, Xiping, Liu, Sanyang (2005) Electronic Journal of Differential Equations (EJDE) [electronic only]
Resonance and strong resonance for semilinear elliptic equations in ℝ N . López Garza, Gabriel, Rumbos, Adolfo J. (2003) Electronic Journal of Differential Equations (EJDE) [electronic only]