@InProceedings{Wan06,
  author = 	 {Raymond Wan and Ichigaku Takigawa and Anh Ngoc Vo and Hiroshi Mamitsuka},
  title = 	 {Combining Vector-Space and Word-Based Aspect Models for Passage Retrieval},
  booktitle = {The Fifteenth Text REtrieval Conference (TREC 2006) Proceedings},
  year      = {2006},
  note      = {NIST (National Institute of Standards and Technology) Special Publication: SP 500-272},
  publisher = {NIST (National Institute of Standards and Technology)},
  location  = {Washington DC, USA},
  pages = 	 {45}
}