Rada Somkhuean and  Suparat Niwitpong and  Sa-aat Niwitpong,  Upper Bound of the Generalize p-Value for the Behrens-Fisher Problem with a Known Ratio of Variances.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1436 - 1439
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/16727.