Á. Barbosa, J. Cardoso, and G. Geiger. NIME 2005 Proceedings, page 184-187. Vancouver, BC, Canada, Media and Graphics Interdisciplinary Centre, University of British, (May 2005)
W. Langdon, and R. Poli. Proceedings of the 2005 IEEE Congress on Evolutionary
Computation, 3, page 2621--2628. Edinburgh, UK, IEEE Press, (2-5 September 2005)
R. Poli, A. Wright, N. McPhee, and W. Langdon. 2006 IEEE World Congress on Computational
Intelligence, 2006 IEEE Congress on Evolutionary
Computation, page 395--402. Vancouver, (16-21 July 2006)