1. A spoken language inquiry system for automatic train timetable information;Aust;Philips J. Res.,1995
2. Probabilistic context-free grammars;Charniak,1993
3. Chen, B., Wang, H.-M., Chien, L.-F., Lee, L.-S., 1998. A*-admissible key-phrase spotting with sub-syllable level utterance verification. In: Proc. ICSLP
4. Chien, L.-F., 1991. Some new approaches for language modeling and processing in speech recognition applications. Ph.D. dissertation, National Taiwan University
5. Language models for spontaneous speech recognition: a bootstrap method for learning phrase bigrams;Giachin,1994