T. Dillon, E. Chang, M. Hadzic, and P. Wongthongtham. APCCM '08: Proceedings of the fifth on Asia-Pacific conference on
conceptual modelling, page 7--17. Darlinghurst, Australia, Australia, Australian Computer Society, Inc., (2008)
M. Ribière, and R. Dieng-Kuntz. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), volume 2393 of Lecture Notes in Computer Science, page 220-234. Springer, (2002)
N. Guarino. Proceedings of the 14th International Conference on Conceptual Structures (ICCS 2006), volume 4068 of Lecture Notes in Computer Science, page 1. Springer, (2006)