Simple Semiconcept Graphs: A Boolean Logic Approach. - Julia Klinger (ICCS, 2001)

Semiconcept Graphs with Variables. - Julia Klinger (ICCS, 2002)

Protoconcept Graphs: The Lattice of Conceptual Contents. - Joachim Hereth Correia; Julia Klinger (ICFCA, 2004)

From Formal Concept Analysis to Contextual Logic. - Frithjof Dau; Julia Klinger (Formal Concept Analysis, 2005)

Local Negation in Concept Graphs. - Julia Klinger (ICCS, 2005)

Protoconceptual Contents and Implications. - Joachim Hereth Correia; Julia Klinger (ICFCA, 2005)