H. Pfeiffer, и R. Hartley. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), том 4604 из Lecture Notes in Artificial Intelligence, стр. 165-178. Berlin, Heidelberg, Springer-Verlag, (июля 2007)
I. Baxter, A. Yahin, L. Moura, M. Sant'Anna, и L. Bier. Proceedings of the International Conference on Software Maintenance, стр. 368--. Washington, DC, USA, IEEE Computer Society, (1998)