Jiang, R., i C. Zhai. „Properties of Unique Positive Solution for a Class of Nonlocal Semilinear Elliptic Equation”. Topological Methods in Nonlinear Analysis, t. 50, nr 2, październik 2017, s. 669-82, https://apcz.umk.pl/TMNA/article/view/TMNA.2017.036.