@Incollection{Stumme95,
  author = {G. Stumme and R. Wille},
  title  = {A geometrical heuristic for drawing concept lattices},

  year   = {1995},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inproceedings{stumme95geometrical,
  author = {Gerd Stumme and Rudolf Wille},
  title  = {A Geometrical Heuristic for Drawing Concept Lattices},

  year   = {1995},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1994/P1677-GD94.pdf},

  const  = {\ text}
}
@Inproceedings{stumme95geometrical,
  author = {Gerd Stumme and Rudolf Wille},
  title  = {A Geometrical Heuristic for Drawing Concept Lattices},

  year   = {1995},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1994/P1677-GD94.pdf},

  const  = {\ text}
}
@Inproceedings{stumme95geometrical,
  author = {Gerd Stumme and Rudolf Wille},
  title  = {A Geometrical Heuristic for Drawing Concept Lattices},

  year   = {1995},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1994/P1677-GD94.pdf},

  const  = {\ text}
}