Cook, R. Dennis, Zhihua Su, and Yi Yang. “Envlp: A MATLAB Toolbox for Computing Envelope Estimators in Multivariate Analysis”. Journal of Statistical Software 62, no. 8 (January 21, 2015): 1–20. Accessed April 20, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v062i08.