Manabu Kotani, Seiichi Ozawa, M. Nakai, Kenzo Akazawa. Emergence of feature extraction function using genetic programming. In Lakhmi C. Jain, editor, Third International Conference on Knowledge-Based Intelligent Information Engineering Systems, KES 1999, Adelaide, South Australia, 31 August - 1 September 1999, Proceedings. pages 149-152, IEEE, 1999. [doi]