@inproceedings{Clark-etAl:2003:CONLL,
  author = {Clark, Stephen  and  Curran, James  and  Osborne, Miles},
  title  = {Bootstrapping POS-taggers using unlabelled data},
  booktitle = {Proceedings of the Seventh Conference on Natural Language Learning at HLT-NAACL 2003},
  editor = {Walter Daelemans and Miles Osborne},
  url    = {http://www.aclweb.org/anthology/W03-0407.pdf},
  year   = 2003,
  pages  = {49--55}