Yaldız, H., Sarıkaya, M. Z., & Dahmani, Z. (2017). 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), 7(2), 205–215. https://doi.org/10.11121/ijocta.01.2017.00405