New Inequalities of Ostrowski Type for Mappings whose Derivatives are $(\alpha, m)$-Convex via Fractional Integrals

New identity similar to an identity of [1] for fractional integrals have been defined. Then making use of this identity, some new Ostrowski type inequalities for Riemann-Liouville fractional integral have been developed. Our results have some relationships with the results of Ozdemir et. al., proved in [1] and the analysis used in the proofs is simple.