We consider the perturbed nonlinear elliptic system , , where is the Sobolev critical exponent. Under proper conditions on , , and , the existence result and multiplicity of the system are obtained by using variational method provided is small enough.
"Existence of Nontrivial Solutions for Perturbed Elliptic System in ." Abstr. Appl. Anal. 2014 1 - 6, 2014. https://doi.org/10.1155/2014/252438