M. Fukumi, S. Omatu, and Y. Nishikawa. Proceedings of the IEEE International joint Conference on Neural
Networks 1994, IJCNN'94, 7, page 4390--4395. IEEE Computer Society, (1994)
M. Fukumi, and S. Omatu. Proceedings of the IEEE International joint Conference on Neural
Networks 1993, IJCNN'93, 3, page 2109--2112. IEEE Computer Society, (1993)