1. Sobolev spaces;Adams,1975
2. The spectrum and an index formula for the Neumann p-Laplacian and multiple solutions for problems with a crossing nonlinearity;Aizicovici;Discrete Contin Dyn Syst Ser A,2009
3. A primer of nonlinear analysis;Ambrosetti,1993
4. Simplicité et isolation de la première valeur propre du p-laplacien avec poids;Anane;C R Acad Sci Paris Sér I Math,1987
5. Nonlinear semigroups and differential equations in Banach spaces;Barbu,1976