1.
AIZICOVICI, Sergiu, PAPAGEORGIOU, Nikolaos S. and STAICU, Vasile. Resonant nonlinear periodic problems with the scalar $p$-Laplacian and a nonsmooth potential. Topological Methods in Nonlinear Analysis. Online. 1 June 2006. Vol. 27, no. 2, pp. 269 - 288. [Accessed 22 July 2024].