@book{SpangenbergWolff97,
  address = {M{\"u}nster},
  editor = {Spangenberg, Norbert and Wolff, Karl Erich},
  interhash = {2cac663165f4307ddda55a2479ac838e},
  intrahash = {253c22a30c840ced5fffe117e9c2cc6e},
  publischer = {Amer.~Math.~Soc.},
  publisher = {Special des Sigmund--Freud--Instituts, Lit Verlag},
  title = {Psychoanalytic research by means of formal concept analysis},
  year = {to appear}
}

@mastersthesis{Hartung89,
  author = {Hartung, Gerd},
  interhash = {feee339e5e0bc0c94d87af98567cec82},
  intrahash = {ab81bdbeec2d4fe7c4ed1de221e5ed96},
  school = { TH Darmstadt },
  title = { Darstellung beschr{\"a}nkter Verb{\"a}nde als Verb{\"a}nde
      offener Begriffe },
  year = { 1989 }
}