Saruhashi, Takumi, Masato Ohkubo, and Yasushi Nagata. “Study on Likelihood-Ratio-Based Multivariate EWMA Control Chart Using Lasso”. Quality Innovation Prosperity 25, no. 1 (March 31, 2021): 3–15. Accessed April 26, 2024. https://qip-journal.eu/index.php/QIP/article/view/1552.