@incollection{Wille87b,
  address = { Mannheim },
  author = {Wille, Rudolf},
  booktitle = { Beitr{\"a}ge zur Begriffsanalyse },
  editor = {Ganter, Bernhard and Wille, Rudolf and Wolff, Karl Erich},
  interhash = {306a7244f4f38d04c77af827f71bea1f},
  intrahash = {9393d6e046e5919370d6ca9d7204f53a},
  pages = { 161-211 },
  publisher = { B.I.--Wissenschaftsverlag },
  title = {{Bedeutungen von Begriffsverb{\"a}nden}},
  year = { 1987 }
}

@article{Wille95b,
  author = {Wille, Rudolf},
  interhash = {c5223bed0a0995c5f3cd8962a9d54212},
  intrahash = {f24cf862d804127a50bf6967a08276c3},
  journal = {Order},
  organisation = {Simon Fraser University},
  pages = {149-158},
  title = {The basic theorem of triadic concept analysis},
  volume = 12,
  year = 1995
}

@inproceedings{Biedermann97a,
  address = {Aachen},
  author = {Biedermann, Klaus},
  booktitle = {General algebra and applications in discrete mathematics},
  editor = {Denecke, K. and L{\"u}ders, O.},
  interhash = {d4b70c32999abf763b635b2203ca5081},
  intrahash = {491dfd061877ee08c8018136df5ad66a},
  pages = {23-33},
  publisher = {Shaker Verlag},
  title = {Triadic Galois connections},
  year = 1997
}