Zhang, Liang, Xianhua Tang, and Yi Chen. “Infinitely Many Solutions for Quasilinear Schrödinger Equations under Broken Symmetry Situation”. Topological Methods in Nonlinear Analysis 48, no. 2 (September 2, 2016): 539–554. Accessed March 28, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2016.057.