@article{10_4064_sm178_2_3, author = {Giuseppe Cordaro}, title = {Multiple solutions to a perturbed {Neumann} problem}, journal = {Studia Mathematica}, pages = {167--175}, publisher = {mathdoc}, volume = {178}, number = {2}, year = {2007}, doi = {10.4064/sm178-2-3}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/sm178-2-3/} }