G. Wilson, und M. Heywood. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, Seite 2067--2073. Washington DC, USA, ACM Press, (25-29 June 2005)
W. Hsieh, J. Madhavan, und R. Pike. SIGMOD '06: Proceedings of the 2006 ACM SIGMOD international conference on Management of data, Seite 725--726. New York, NY, USA, ACM, (2006)