G. Stumme. Conceptual Structures: Knowledge Representation as Interlingua Proc. ICCS'96, volume 1115 of LNAI, page 308-320. Heidelberg, Springer, (1996)
G. Stumme, and K. Wolff. Proc. Intl. Symposium on Knowledge Retrieval, Use, and Storage for Efficiency, page 206-219. Vancouver, Canada, (августа 1997)
F. Lehmann, and R. Wille. Conceptual structures: applications, implementation and theory, 954, page 32-43. Berlin--Heidelberg--New~York, Springer--Verlag, (1995)