LI, Shuoshuo, SHEN, Zifei and ZHOU, Jiazheng. Nonlocal elliptic equation with critical exponential growth and resonance in high-order eigenvalues. Topological Methods in Nonlinear Analysis. Online. 5 December 2021. Vol. 58, no. 2, pp. 569 - 590. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2020.077.