Qazi Aftab Kabir, Masroor Mohammad, Rizwana Jamal, and Ramakant Bhardwaj. 2017. “Unique Fixed Points and Mappings in Hyperconvex Metric Spaces”. International Journal of Mathematics And Its Applications 5 (3 - B):171-77. https://ijmaa.in/index.php/ijmaa/article/view/862.