E. Brucherseifer, P. Bechtel, S. Freyer, and P. Marenbach. Genetic Programming, Proceedings of EuroGP'2001, volume 2038 of LNCS, page 268--279. Lake Como, Italy, Springer-Verlag, (18-20 April 2001)
M. Veit, and S. Herrmann. AOSD '03: Proceedings of the 2nd international conference on Aspect-oriented software development, page 140--149. New York, NY, USA, ACM, (2003)