References

1. Harvey F. Silverman and David P. Morgan, The Application of Dynamic Programming to Connected Speech Recognition, July 1990 IEEE ASSP Magazine.
   
   
2. John R. Deller, Jr, John G. Proakis, John H. L. Hansen, Discrete-Time Processing of Speech Signals, Macmillan Publishing Company.
   
   
3. N. Deshmukh, A. Ganapathiraju and J. Picone, "Hierarchical Search for Large Vocabulary Conversational Speech Recognition" IEEE Signal Processing Magazine, vol. 1, no. 5, pp. 84-107, September 1999.