A. K. Dubey, Rohit Verma, and R. P. Dubey. “Some Common Fixed Point Results for Multivalued Mapping in Cone Metric Spaces”. International Journal of Mathematics And its Applications 3, no. 1 (March 15, 2015): 1–6. Accessed April 27, 2024. http://ijmaa.in/index.php/ijmaa/article/view/397.