@InProceedings{ramshaw:1991:ACL,
  author    = {Lance A. Ramshaw},
  title     = {A THREE-LEVEL MODEL FOR PLAN EXPLORATION},
  booktitle = {Proceedings of the 29th Annual Meeting of the Association for Computational Linguistics},
  month     = {June},
  year      = {1991},
  address   = {Berkeley, California, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {39--46},
  url       = {http://www.aclweb.org/anthology/P91-1006},
  doi       = {10.3115/981344.981350}
}