1.
Iqbal I, Hussain N. Ekeland-type variational principle with applications to nonconvex minimization and equilibrium problems. NAMC [Internet]. 2019 Apr. 23 [cited 2025 Oct. 27];24(3):407-32. Available from: https://test.zurnalai.vu.lt/nonlinear-analysis/article/view/12882