@InProceedings{kobayashi-EtAl:2011:ROBUS,
  author    = {Kobayashi, Hayato  and  Wakaki, Hiromi  and  Yamasaki, Tomohiro  and  Suzuki, Masaru},
  title     = {Topic Models with Logical Constraints on Words},
  booktitle = {Proceedings of Workshop on Robust Unsupervised and Semisupervised Methods in Natural Language Processing},
  month     = {September},
  year      = {2011},
  address   = {Hissar, Bulgaria},
  pages     = {33--40},
  url       = {http://www.aclweb.org/anthology/W11-3905}
}