Meftah B, Souahi A. Fractional Hermite-Hadamard type integral inequalities for functions whose modulus of the mixed derivatives are co-ordinated s-preinvex in the second sense. Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2019 May 13 [cited 2024 Nov. 21];18:67-83. Available from: https://studmath.uken.krakow.pl/article/view/7942