Altun, I., Tanveer, M., & Imdad, M. (2012). COMMON FIXED POINT THEOREMS OF INTEGRAL TYPE IN MENGER PM SPACES. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), 3(1), 55–66. retrieved from https://ph03.tci-thaijo.org/index.php/jnao/article/view/2654