Meftah, Badreddine, and Abdourazek Souahi. “Fractional Hermite-Hadamard Type Integral Inequalities for Functions Whose Modulus of the Mixed Derivatives Are Co-Ordinated S-Preinvex in the Second Sense”. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica 18 (May 13, 2019): 67–83. Accessed October 16, 2024. https://studmath.uken.krakow.pl/article/view/7942.