1. Allen, J.F., Miller, B.W., Ringger, E.K., Sikorshi, T., 1996. Robust understanding in a dialogue system. In: 34th Annual Meeting of the Association for Computational Linguistics, Santa Cruz, CA, USA, pp. 62–70.
2. Bangalore, S., Johnston, M., 2004. Balancing data-driven and rule-based approaches in the context of a multimodal conversational system. In: Human Language Technology/Conference of the North American Chapter of the Association for Computational Linguistics, Boston, MA, USA.
3. Carpenter, B., Chu-Carroll, J., 1998. Natural language call routing: a robust, self-organizing approach. In: International Conference on Speech and Language Processing, Sydney, Australia.
4. Chelba, C., Mahajan, M., Acero, A., 2003. Speech utterance classification. In: IEEE International Conference on Acoustics, Speech and Signal Processing, Hong Kong, China.
5. Della Pietra, S., Epstein, M., Roukos, S., Ward, T., 1997. Fertility models for statistical natural language understanding. In: 35th Annual Meeting of the Association for Computational Linguistics, Madrid, Spain, pp. 168–173.