Padcharoen, A., D. Gopal, and N. Akkasriworn. “HARDY-ROGERS TYPE MAPPINGS ON DISLOCATED QUASI METRIC SPACES”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 8, no. 2 (December 31, 2017): 95–108. accessed September 2, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2857.