Suparat Niwitpong,  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 2012, vol. 69(9). 1365 - 1368
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/13610.