Wang, Zhengping, Xiaoju Zhang, and Jianqing Chen. “Standing Waves for Nonlinear Schrödinger-Poisson Equation With High Frequency”. Topological Methods in Nonlinear Analysis 45, no. 2 (June 1, 2015): 601–614. Accessed December 4, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2015.028.