Zeng, Jing, Wenjing Wang, and Xin Zhang. “TRES: An R Package for Tensor Regression and Envelope Algorithms”. Journal of Statistical Software 99, no. 12 (October 22, 2021): 1–31. Accessed March 29, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v099i12.