Gupta, A. K., and D. G. Kabe. “Elliptically Contoured Model and Factorization of Wilks’ $ \Lambda$: Noncentral Case”. Tamkang Journal of Mathematics 31, no. 3 (September 30, 2000): 213–222. Accessed April 26, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/395.