Contextual-Logic Extension of TOSCANA..
In: B. Ganter and G. W. Mineau, editors, Conceptual Structures: Logical, Linguistic, and Computational, volume 1867, series LNAI, pages 453-467. Springer, Heidelberg, 2000.
P. Eklund, B. Groh, G. Stumme and R. Wille.
[doi]  [BibTeX] 

Lattices of Triadic Concept Graphs.
In: B. Ganter and G. W. Mineau, editors, Conceptual Structures: Logical, Linguistic, and Computational Issues, volume 1867, series Lecture Notes in Computer Science, pages 332-341. Springer, 2000.
B. Groh and R. Wille.
[BibTeX]