Yolacan E, Kiziltunc H, Kir M. Coincidence point theorems for $\varphi$-$\psi$-contraction mappings in metric spaces involving a graph. Carpathian Math. Publ. [Internet]. 2016 Dec. 30 [cited 2024 May 6];8(2):251-62. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/1431