Thangjai, W. ., and S. . Niwitpong. “Simultaneous Confidence Intervals for All Differences of Coefficients of Variation of Two-Parameter Exponential Distributions”. Thailand Statistician, vol. 18, no. 2, Mar. 2020, pp. 135-49, https://ph02.tci-thaijo.org/index.php/thaistat/article/view/240223.