@InProceedings{burheim:1998:NODALIDA,
  author    = {Burheim, Tore},
  title     = {Some Results Regarding Tree Homomorphic Feature Structure Grammar and the Empty String},
  booktitle = {Proceedings of the 11th Nordic Conference of Computational Linguistics (NODALIDA 1998)},
  month     = {March},
  year      = {1998},
  address   = {Copenhagen, Denmark},
  publisher = {Center for Sprogteknologi, University of Copenhagen, Denmark},
  pages     = {176--185},
  url       = {http://www.aclweb.org/anthology/W98-1619}
}