@Inproceedings{stumme96concept, author = {Stumme, Gerd}, title = {The Concept Classification of a Terminology Extended by Conjunction and Disjunction}, year = {1996}, number = {}, url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1996/P1829-PRICAI96.pdf}, const = {\ text} }