@InProceedings{popovic-ney:2007:WMT,
  author    = {Popovic, Maja  and  Ney, Hermann},
  title     = {Word Error Rates: Decomposition over {POS} classes and Applications for Error Analysis},
  booktitle = {Proceedings of the Second Workshop on Statistical Machine Translation},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {48--55},
  url       = {http://www.aclweb.org/anthology/W/W07/W07-0207}
}