Kılınç, S.; Akkurt, A.; Yıldırım, H. On Hermite-Hadamard Type Inequalities for S-Phi_preinvex Functions by Using Riemann-Liouville Fractional Integrals. Int. J. Optim. Control, Theor. Appl. (IJOCTA) 2019, 9, 253-260.