“…For example, Máté [10] studied the case of weaker contractions, Leśniak [8] the case of multivalued contractions, Petruşel [14] and Dumitru [4] the case of Meir-Keeler contractions, Llorens-Fuster, Petruşel and Yao [9] the case of mixed-type contractions, Boriceanu, Bota and Petruşel [2] the case of set-valued contractions on a b-metric space, Gwóźdź-� Lukowska and Jachymski [5] the case of contractions on a metric space endowed with a directed graph and Secelean [18] the case of F -contractions. For other related results see [1,3,7,11,13,15,20,23,24].…”