@book{ganter1999formal,
  address = {Berlin; New York},
  author = {Ganter, Bernhard and Wille, Rudolf},
  interhash = {1b0bf49069eadcdfac42e52addf4eb9d},
  intrahash = {72729e14c41cfb00745c9a21f3265fed},
  isbn = {3540627715 9783540627715},
  publisher = {Springer},
  refid = {40163504},
  title = {Formal concept analysis : mathematical foundations},
  url = {http://www.amazon.de/Formal-Concept-Analysis-Mathematical-Foundations/dp/3540627715/ref=sr_1_1?ie=UTF8&qid=1417077494&sr=8-1&keywords=formal+concept+analysis+mathematical+foundations},
  year = 1999
}