@article{Papageorgiou_Santos_Staicu_2010, title={Nontrivial solutions for nonvariational quasilinear Neumann problems}, volume={36}, url={https://apcz.umk.pl/TMNA/article/view/TMNA.2010.027}, abstractNote={We consider a nonlinear nonvariational Neumann problem with a nonsmooth
potential. Using the spectrum of the assymptotic (as $\vert x\vert
\rightarrow\infty)$ differential operator and degree theoretic techniques
based on the degree map of certain multivalued perturbations of (S)$_{+}$-operators, we establish the existence of at least one
nontrivial smooth solution.}, number={1}, journal={Topological Methods in Nonlinear Analysis}, author={Papageorgiou, Nikolaos S. and Santos, Sandrina Rafaela Andrade and Staicu, Vasile}, year={2010}, month={Apr.}, pages={39–59} }