Team, S. “Fixed Points of Set-Valued Mappings under Generalized Contractive Conditions in Ordered Metric Spaces: Hemant Kumar Nashine, Zoran Kadelburg”. Thai Journal of Mathematics, vol. 15, no. 3, Dec. 2017, pp. 819-34, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/721.