Erden, Samet, and M. Zeki Sarikaya. “Some Weighted Inequalities for Higher-Order Partial Derivatives in Two Dimensions and Its Applications”. Journal of the Indonesian Mathematical Society 26, no. 3 (November 5, 2020): 345–368. Accessed December 3, 2024. https://jims-a.org/index.php/jimsa/article/view/919.