SIAWASH, Syed Nasim. Equivalences of Ekeland-Type Variational Principle in the Setting of Quasi-Metric Spaces. Journal of Natural Sciences – Kabul University, [S. l.], v. 3, n. 2, p. 197–206, 2020. DOI: 10.62810/jns.v3i2.163. Disponível em: https://jns.edu.af/jns/article/view/163. Acesso em: 4 apr. 2025.