1. Optimal Statistical Decisions;De Groot,1970
2. Maximum Likelihood estimation from incomplete data;Dempster;J. Roy. Statist. Soc. B,1977
3. Speaker adaptation using constrained estimation of Gaussian mixtures;Digalakis;IEEE Trans. Speech Audio Process.,1995
4. Pattern Classification;Duda,2000
5. Gales, M., 1996. The generation and use of regression class trees for MLLR adaptation. Tech. Rep. TR263, Cambridge University Engineering Department