@inproceedings{Zhou-etAl:2003:EMNLP,
  author = {Zhou, Yaqian  and  Weng, Fuliang  and  Wu, Lide  and  Schmidt, Hauke},
  title  = {A Fast Algorithm for Feature Selection in Conditional Maximum Entropy Modeling},
  booktitle = {Proceedings of the 2003 Conference on Empirical Methods in Natural Language Processing},
  editor = {Michael Collins and Mark Steedman},
  url    = {http://www.aclweb.org/anthology/W03-1020.pdf},
  year   = 2003,
  pages  = {153--159}