Nanan, N. (2013) “ULAM-HYERS STABILITY OF A FIXED POINT EQUATION VIA GENERALIZED PICARD OPERATORS”, Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), 4(2), pp. 181–187. available at: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2715 (accessed: 2 September 2026).