Lee, Ming Ha. “VARIABLE SAMPLE SIZE AND SAMPLING INTERVALS WITH FIXED TIMES HOTELLING’S T^2 CHART”. International Journal of Industrial Engineering: Theory, Applications and Practice 20, no. 3-4 (August 20, 2013). Accessed May 19, 2024. https://journals.sfu.ca/ijietap/index.php/ijie/article/view/349.