HOSSEINI, Seyedehsomayeh and POURYAYEVALI, Mohamad R. Equilibria on $L$-retracts in Riemannian manifolds. Topological Methods in Nonlinear Analysis. Online. 1 June 2016. Vol. 47, no. 2, pp. 579 - 592. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2016.017.