@InProceedings{nishikawa-EtAl:2012:POSTERS,
  author    = {Nishikawa, Hitoshi  and  Hirao, Tsutomu  and  Makino, Toshiro  and  Matsuo, Yoshihiro},
  title     = {Text Summarization Model based on Redundancy-Constrained Knapsack Problem},
  booktitle = {Proceedings of COLING 2012: Posters},
  month     = {December},
  year      = {2012},
  address   = {Mumbai, India},
  publisher = {The COLING 2012 Organizing Committee},
  pages     = {893--902},
  url       = {http://www.aclweb.org/anthology/C12-2087}
}