S. Feldman, M. Marin, M. Ostendorf, and M. Gupta. Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing, page 4781--4784. Washington, DC, USA, IEEE Computer Society, (2009)
D. Hillard, M. Ostendorf, and E. Shriberg. NAACL '03: Proceedings of the 2003 Conference of the North American Chapter of the Association for Computational Linguistics on Human Language Technology, page 34--36. Morristown, NJ, USA, Association for Computational Linguistics, (2003)