@InProceedings{Wan07,
  author = 	 {Raymond Wan and Anh Ngoc Vo and Hiroshi Mamitsuka},
  title = 	 {Passage Retrieval with Vector Space and Query-Level Aspect Models },
  booktitle = {The Sixteenth Text REtrieval Conference (TREC 2007) Proceedings},
  year      = {2007},
  note      = {NIST (National Institute of Standards and Technology) Special Publication: SP 500-274},
  publisher = {NIST (National Institute of Standards and Technology)},
  location  = {Washington DC, USA},
  pages = 	 {37}
}