Josu Arteche and  Jesus Orbe,  Small Sample Bootstrap Confidence Intervals for Long-Memory Parameter.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 823 - 831
    [viewed 19 October 2019]. Available from: https://publications.waset.org/pdf/14766.