1. Elementary Linear Algebra;Anton,1973
2. Mathematical Analysis;Apostol,1957
3. Perplexity—a measure of the difficulty of speech recognition tasks;Bahl;Journal of the Acoustical Society of America,1977
4. A maximum likelihood approach to continuous speech recognition;Bahl;IEEE Transactions on Pattern Analysis and Machine Intelligence,1983
5. A. Berger, P. Brown, S. Della Pietra, V. Della Pietra, J. Gillett, J. Lafferty, H. Printz, L. Ureš, Proceedings of the DARPA Conference on Human Language Technology Workshop, 1994, 157, 162, Plainsboro, NJ, March 1994. Morgan Kaufmann Publishers, Inc