Niwitpong, Sa-aat, and Pianpool Kirdwichai. “Adjusted Bonett Confidence Interval for Standard Deviation of Non-Normal Distributions”. Thailand Statistician 6, no. 1 (May 28, 2015): 1–16. Accessed May 2, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34327.