@InProceedings{FokZha,
      AUTHOR = {Fokkens, Antske and Zhang, Yi and Bender, Emily},
      TITLE = {Spring cleaning and grammar compression : two techniques for detection of redundancy in HPSG grammars},
      YEAR = {2011},
      BOOKTITLE = {Proceedings of the 25th Pacific Asia Conference on Language, Information and Computation : PACLIC 25 ; 16-18 December 2011, Singapore},
      ADDRESS = {Singapore}
}