@InProceedings{huang-papineni:2007:EMNLP-CoNLL2007,
  author    = {Huang, Fei  and  Papineni, Kishore},
  title     = {Hierarchical System Combination for Machine Translation},
  booktitle = {Proceedings of the 2007 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning (EMNLP-CoNLL)},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  pages     = {277--286},
  url       = {http://www.aclweb.org/anthology/D/D07/D07-1029}
}