G. Cottrell, and K. Plunkett. Proceedings of the 13th Annual Conference of the Cognitive Science Society, page 328--333. Hillsdale, NJ: Erlbaum, (1991)
K. Plunkett, V. Marchman, and S. Knudsen. Connectionist Models: Proceedings of the 1990 Summer School, page 201--219. San Francisco, CA: Morgan Kaufmann, (1990)
N. Meuleau, L. Peshkin, K. Kim, and L. Kaelbling. Proceedings of the Fifteenth International Conference on Uncertainty in Artificial Intelligence, (1999)