Kashuri, A., and R. Liko. “Some New Ostrowski Type Fractional Integral Inequalities for Generalized Relative Semi-(r; M, H)-Preinvex Mappings via Caputo K-Fractional Derivatives.”. Proyecciones (Antofagasta, On Line), vol. 38, no. 2, June 2019, pp. 363-94, https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/3583.