@book{rijsbergen79information,
  address = {London},
  author = {van Rijsbergen, C. J.},
  edition = 2,
  interhash = {0edccdac9af024f458911b82f61686ab},
  intrahash = {b53893655b48140d4310a848dbf204d3},
  publisher = {Butterworths},
  title = {Information retrieval},
  url = {http://www.dcs.gla.ac.uk/Keith/Preface.html},
  year = 1979
}

@book{books/aw/Baeza-YatesR99,
  author = {Baeza-Yates, Ricardo A. and Ribeiro-Neto, Berthier A.},
  interhash = {6f78177742b3c836218aacfc7fc4c43c},
  intrahash = {16ab70975f635f8d72de82e2ef3ef9de},
  isbn = {0-201-39829-X},
  publisher = {ACM Press / Addison-Wesley},
  title = {Modern Information Retrieval},
  url = {http://www.ischool.berkeley.edu/~hearst/irbook/glossary.html},
  year = 1999
}