@inproceedings{Wille89b,
  address = { Berlin--Heidelberg },
  author = {Wille, Rudolf},
  booktitle = { Conceptual and numerical analysis of data },
  editor = {Opitz, Otto},
  interhash = {ea7314186ba3d68b21bbbcda0e787e8c},
  intrahash = {4dd2b67aaf47097e4654c3726abddd7c},
  pages = { 239-255 },
  publisher = { Springer--Verlag },
  title = { Geometric representation of concept lattices },
  year = { 1989 }
}