1. The proofs are entirely analogous to the proof of Theorem 3.1 (vi) in Magnus and Neudecker (1979), and are therefore omitted. ? References Davidson;Estimation and Inference in Econometrics,1993
2. Matrix Variate Dirichlet Distributions
3. Vec and Vech operators for matrices, with some uses in Jacobians and multivariate statistics;V H Henderson;Canadian Journal of Statistics,1979
4. The commutation matrix: some properties and applications;J R Magnus;Annals of Statistics,1979