1. Ch(Σ) Quadratic T n k (0 I n ⊗ Σ) Joarder&Ahmed (1996)
2. Σ Entropy T n k (0 I n ⊗ Σ) Joarder&Ali (1997)
3. tr(Σ) Quadratic T n k (0 I n ⊗ Σ) Joarder&Singh (2001)
4. Σ ∗ Quadratic S n k (0 I n ⊗ Σ) Leung&Ng (2004)
5. A~~~~~~~ T. W. (1984). An Introduction to Multivariate Statistical Analysis. John Wiley & Sons New York.