@InProceedings{19991212b,
   author =    {E. Levin, R. Pieraccini, W. Eckert, G. Di Fabbrizio, S. Narayanan},
   title =     {Spoken Language Dialogue: From Theory To Practice},
   booktitle = {IEEE Automatic Speech Recognition and Understanding Workshop},
   address =   {Keystone, Colorado, USA},
   month =     {December 12 -15},
   year =      {1999}
}