G. L. C. Yap,  Normalizing Logarithms of Realized Volatility in an ARFIMA Model.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 120(12). 609 - 614
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/10005813.