Meftah, B., & Souahi, A. (2019). Fractional Hermite-Hadamard type inequalities for functions whose derivatives are extended s-(?,m)-preinvex. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), 9(1), 73–81. https://doi.org/10.11121/ijocta.01.2019.00574