@InProceedings{li-liu-zhao:2015:NAACL-HLT1,
  author    = {Li, Chen  and  Liu, Yang  and  Zhao, Lin},
  title     = {Using External Resources and Joint Learning for Bigram Weighting in ILP-Based Multi-Document Summarization},
  booktitle = {Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  month     = {May--June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {778--787},
  url       = {http://www.aclweb.org/anthology/N15-1079}
}