ZHANG, Mengjie and YANG, Yunyan. Critical points of a mean field type functional on a closed Riemann surface. Topological Methods in Nonlinear Analysis. Online. 31 August 2022. Vol. 60, no. 1, pp. 267 - 285. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2021.055.