Mingoti, Sueli, and Letícia Pinto. “ALTERNATIVE HYPOTHESIS TESTS FOR THE COVARIANCE MATRIX BASED ON EIGENVALUES AND MULTIVARIATE NORMALITY”. Brazilian Journal of Operations & Production Management 9, no. 1 (May 14, 2013): 9-27. Accessed May 22, 2019. https://bjopm.emnuvens.com.br/bjopm/article/view/V9N1A1.