WASET
    Wararit Panichkitkosolkul,  Unit Root Tests Based On the Robust Estimator.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2014, vol. 88(4). 647 - 651
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/9998027.