Yaldız, H., M. Z. Sarıkaya, and Z. Dahmani. “On the Hermite-Hadamard-Fejer-Type Inequalities for Co-Ordinated Convex Functions via Fractional Integrals”. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), vol. 7, no. 2, July 2017, pp. 205-1, doi:10.11121/ijocta.01.2017.00405.