D.F. ANDREWS, R. GNANADESIKAN, J.L. WARNER, Methods for Assessing Multivariate NormalityMultivariate Analysis–III#R##N#Proceedings of the Third International Symposium on Multivariate Analysis Held at Wright State University, Dayton, Ohio, June 19–24, 1972. pp. 95- 116 ,(1973) , 10.1016/B978-0-12-426653-7.50012-0