Some New Hermite-Hadamard-Fejer Type Inequlaties via k-Fractional Integrals Concerning Differentiable Generalized Relative Semi-(r; m, h1, h2)-Preinvex Mappings. Eur. J. Pure Appl. Math. 2018;11(1):51-68. doi:10.29020/nybg.ejpam.v11i1.3196