Rajda-Tasior, Angelina, and Grzegorz Kończak. “On the Monitoring Complex Multivariate Processes”. Acta Universitatis Lodziensis. Folia Oeconomica 3, no. 322 (December 8, 2016): [27]–36. Accessed May 2, 2024. https://czasopisma.uni.lodz.pl/foe/article/view/749.