F. Brau, U. Ebert, L. Schafer, and A. Luque. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
C. Ebert, and J. Man. ICSE '05: Proceedings of the 27th international conference on Software engineering, page 553--560. New York, NY, USA, ACM Press, (2005)
O. Corby, R. Dieng, and C. Hébert. Conceptual Structures: Logical, Linguistic, and Computational
Issues, 8th International Conference on Conceptual Structures,
ICCS 2000, Darmstadt, Germany, August 14-18, 2000, Proceedings, volume 1867 of LNCS, page 468--482. Springer, (2000)