FACTA UNIVERSITATIS-SERIES MATHEMATICS AND INFORMATICS, sa.2, ss.407-428, 2023 (ESCI)
In this paper, we firstly obtain a new generalized identity for twice partially differentiable functions Riemann-Liouville fractional integrals. Then, using this equality, we obtain some midpoint-type inequalities for co-ordinated convex and co-ordinated concave functions. We also show that our result generalizes the give several inequalities obtained in earlier works.