Jiamwattanapong, Knavoot, Nisand Ingadapa, and Bandhita Plubin. “On Testing Homogeneity of Covariance Matrices With Box’s M and the Approximate Tests for Multivariate Data”. European Journal of Applied Sciences 9, no. 5 (November 7, 2021): 426–436. Accessed November 24, 2024. http://116.203.177.230/index.php/AIVP/article/view/11115.