“Hermite-Hadamard Type Integral Inequalities for Functions Whose Mixed Partial Derivatives Are Co-Ordinated Preinvex”. Punjab University Journal of Mathematics 52, no. 1 (May 14, 2025): 63–76. Accessed June 29, 2025. https://pujm.pu.edu.pk/index.php/pujm/article/view/313.