@book{pollandt97fuzzy,
  address = {Berlin--Heidelberg},
  author = {Pollandt, Silke},
  interhash = {93875c0952c3a4284b16ebb375ac557e},
  intrahash = {dc41ef959c69e671ffbc6176d00ccbbb},
  publischer = {Amer.~Math.~Soc.},
  publisher = {Springer--Verlag},
  title = {Fuzzy Begriffe: Formale Begriffsanalyse von unscharfen Daten},
  year = 1997
}