Meftah, Badreddine, Meriem Merad, and Abdourazek Souahi. “Fractional Ostrowski Type Inequalities for Functions Whose Mixed Derivatives Are Prequasiinvex and Alpha-Prequasiinvex Functions”. Journal of the Indonesian Mathematical Society 25, no. 2 (July 10, 2019): 92–107. Accessed October 5, 2024. http://jims-a.org./index.php/jimsa/article/view/751.