Yilun Shang,  On the Central Limit Theorems for Forward and Backward Martingales.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 637 - 640
    [viewed 02 May 2024]. Available from: https://publications.waset.org/pdf/15186.