@InProceedings{masuda:2003:ACL-companion,
  author    = {Katsuya Masuda},
  title     = {A Ranking Model of Proximal and Structural Text Retrieval Based on Region Algebra},
  booktitle = {The Companion Volume to the Proceedings of 41st Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2003},
  address   = {Sapporo, Japan},
  publisher = {Association for Computational Linguistics},
  pages     = {50--57},
  url       = {http://www.aclweb.org/anthology/P03-2007},
  doi       = {10.3115/1075178.1075185}
}