@InProceedings{oehrle:TAG+4:1998,
  author    = {Oehrle, Dick},
  title     = {Constructive models of extraction parameters},
  booktitle = {Proceedings of the Fourth International Workshop on Tree Adjoining Grammars and Related Frameworks (TAG+4)},
  month     = {August},
  year      = {1998},
  address   = {University of Pennsylvania},
  pages     = {128--142},
  url       = {http://www.aclweb.org/anthology/W98-0133}
}