@InProceedings{black-EtAl:1993:ACL,
  author    = {Ezra Black  and  Fred Jelinek  and  John Lafrerty  and  David M. Magerman  and  Robert Mercer  and  Salim Roukos},
  title     = {Towards History-based Grammars: Using Richer Models for Probabilistic Parsing},
  booktitle = {Proceedings of the 31st Annual Meeting of the Association for Computational Linguistics},
  month     = {June},
  year      = {1993},
  address   = {Columbus, Ohio, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {31--37},
  url       = {http://www.aclweb.org/anthology/P93-1005},
  doi       = {10.3115/981574.981579}
}