Almahmoudi, M.A. , Khaga, R.M. and Enaami, M.E. 2019. Simulation–Based Comparison of Estimated Methods for the Differencing Fractional Parameter in ARFIMA Model: there is a problem in the abstract. we put another abstract to check the results. The Libyan Journal of Science. 22, 1 (Oct. 2019), 79–93. DOI:https://doi.org/10.55276/ljs.v22i1.135.