Suparat Niwitpong and  Sa-aat Niwitpong,  On Simple Confidence Intervals for the Normal Mean with Known Coefficient of Variation.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1444 - 1447
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/16732.