1. “Genetic Programming: Building Artificial Nervous Systems Using Genetically Programmed Neural Network Modules”, Hugo de Garis, in Porter B.W. & Mooney R.J. ed., Proc. 7th. Int. Conf. on Machine Learning, pp 132-139, Morgan Kaufmann, 1990.
2. “Genetic Programming: Modular Evolutionfor Darwin Machines”, Hugo de Garis, Int. joint Conf. on Neural Networks, January 1990, Washington DC, USA.
3. “Lizzy: The Genetic Programming of an Artificial Nervous System”, Hugo de Garis, Int. Conf. on Artificial Neural Networks, June, 1991, Espoo, Finland.
4. “Genetic Programming, Artificial Nervous Systems, Artificial Embryos, and Embryological Electronics”, Hugo de Garis, in “Parallel Problem Solving from Nature”, Lecture Notes in Computer Science, 496, Springer Verlag, 1991. [de Garis 1992] “Artfcial Nervous Systems: The Genetic Programming of Production Rule GenNet Circuits”, Hugo de Garis, Int. Joint Conf. on Neural Networks, November 1992, Beijing, China.
5. “Neurite Networks: The Genetic Programming of Cellular Automata based Neural Nets which Grow”, Hugo de Garis, Int. Joint Conf. on Neural Networks, October 1993, Nagoya, Japan.