@Inproceedings{eklund00contextual,
  author = {Eklund, P. and Groh, B. and Stumme, G. and Wille, R.},
  title  = {Contextual-Logic Extension of TOSCANA.},

  year   = {2000},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2000/ICCS_toscanaextension.pdf},

  const  = {\ text}
}
@Inproceedings{prediger99lattice,
  author = {Prediger, Susanne and Wille, Rudolf},
  title  = {The Lattice of Concept Graphs of a Relationally Scaled Context},

  year   = {1999},
  number = {},
  url    = {http://dblp.uni-trier.de/db/conf/iccs/iccs99.html#PredigerW99},

  const  = {\ text}
}
@Inproceedings{wille97conceptual,
  author = {Wille, Rudolf},
  title  = {Conceptual Graphs and Formal Concept Analysis},

  year   = {1997},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inproceedings{stumme95geometrical,
  author = {Stumme, Gerd and Wille, Rudolf},
  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}
}