1. Growth transformations for probabilistic functions of stochastic grammars;Casacuberta;Internat. J. Pattern Recognition Artificial Intelligence,1996
2. Garey, M.R., Johnson, D.S., 1979. Computer and Intractability; A Guide to the Theory of NP-Completeness. Freeman, New York
3. Jelinek, F., 1997. Statistical Methods for Speech Recognition. MIT Press, Cambridge
4. A comparative study of two search strategies for connected word recognition: dynamic programming and heuristic search;Ney;IEEE Trans. Pattern Analysis Machine Intelligence,1992
5. Rabiner, L.R., Juang, B.H., 1993. Fundamentals of Speech Recognition. Prentice-Hall, Englewood Cliffs, NJ