@inproceedings{PulmanComparatives,
  title = "Comparatives and Ellipsis",
  author = "S. G. Pulman",
  year = "1991",
  booktitle = "Proceedings of the 5th European Meeting of the Association for Computational Linguistics, Berlin",
  pages = "1--6",
  url = "http://acl.ldc.upenn.edu/E/E91/E91-1002.pdf",
}