Thangjai, W. ., S.-A. . Niwitpong, and S. . Niwitpong. “Simultaneous Confidence Intervals for All Differences of Coefficients of Variation of Normal Distributions With an Application to PM2.5 Dispersion”. Thailand Statistician, vol. 20, no. 1, Dec. 2021, pp. 207-26, https://ph02.tci-thaijo.org/index.php/thaistat/article/view/245860.