Arunee Wongkha and  Suparat Niwitpong and  Sa-aat Niwitpong,  Confidence Interval for the Inverse of a Normal Mean with a 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). 1408 - 1411
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/16712.