Kumam, Poom, Arslan Hojat Ansari, and Kanokwan Sitthithakerngkiet. 2016. “Coupled Best Proximity Points under the Proximally Coupled Contraction in a Complete Ordered Metric Space”. Communications in Mathematics and Applications 7 (3):275-89. https://doi.org/10.26713/cma.v7i3.437.