P. Krus, and J. Nyman. Proceedings of the 22nd international Congress of Aeronautical Sciences, International Council of the Aeronautical Sciences : American Institute of Aeronautics and Astronautics : Optimage Ltd., (September 2000)
K. Seo, E. Goodman, and R. Rosenberg. Proceedings of the Genetic and Evolutionary
Computation Conference (GECCO-2001), page 189. San Francisco, California, USA, Morgan Kaufmann, (7-11 July 2001)
H. Klus, D. Niebuhr, and A. Rausch. Proceedings of the International Workshop on Engineering of software services for pervasive environments (ESSPE 2007), page 21--28. Dubrovnik, Croatia, ACM, (September 2007)Electronic Proceedings.
L. Niu, and G. Quan. CASES '04: Proceedings of the 2004 international conference on Compilers, architecture, and synthesis for embedded systems, page 140--148. New York, NY, USA, ACM, (2004)
H. van Ditmarsch, W. van der Hoek, and B. Kooi. Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007), volume 4604 of Lecture Notes in Artificial Intelligence, page 45-58. Berlin, Heidelberg, Springer-Verlag, (July 2007)