@misc{W1972573551,
  author = {Scott Soames and Gerald Gazdar and Ewan Klein and Geoffrey K. Pullum and Ivan A. Sag},
  title = {Generalized Phrase Structure Grammar.},
  year = {1989},
  howpublished = {The Philosophical Review},
  doi = {https://doi.org/10.2307/2185122}
}