“…Our results also generalize and extend some fixed point and coupled fixed point theorems in partially ordered complete metric spaces and b-metric spaces given by Harjani and Sadarangani [10], Nieto and Rodríguez-López [14,16], Nieto et al [15], Jleli et al [13], O'Regan and Petruşel [17], Ran and Reurings [18], Gnana Bhaskar and Lakshmikantham [8], and Chifu and Petrusel in [6].…”