Jiang, Y., Z. Wang, and H.-S. Zhou. “Positive Solutions for Schrödinger-Poisson-Slater System With Coercive Potential”. Topological Methods in Nonlinear Analysis, vol. 57, no. 2, Feb. 2021, pp. 427-39, https://apcz.umk.pl/TMNA/article/view/TMNA.2020.041.