Team, Support. “Non-Normality and the Fuzzy Theory for Variable Parameters Control Charts: Chaowalit Panthong, Adisak Pongpullponsak”. Thai Journal of Mathematics 14, no. 1 (April 1, 2016): 203–213. Accessed May 19, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/591.