Singh, D., A. Ahmed, M. Singh, and S. S. Tomar. 2013. “A COMMON FIXED POINT THEOREM VIA FAMILY OF R-WEAKLY COMMUTING MAPS”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 5 (1):115-23. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2743.