Kashuri, A., and R. Liko. “Hermite-Hadamard Type Fractional Integral Inequalities for Products of Two MT(r;G,m,φ)-Preinvex Functions ”. Proyecciones (Antofagasta, On Line), vol. 39, no. 1, Feb. 2020, pp. 219-42, doi:10.22199/issn.0717-6279-2020-01-0014.