Kumar Mohanta, Sushanta. “Coupled Coincidence Points for Generalized (ψ, Ï•)-Pair Mappings in Ordered Cone Metric Spaces”. CUBO, A Mathematical Journal 16, no. 2 (June 1, 2014): 135–148. Accessed October 12, 2025. https://cubo.ufro.cl/index.php/cubo/article/view/1281.