M. Fukumi, S. Omatu, and Y. Nishikawa. Proceedings of the IEEE International joint Conference on Neural
Networks 1995, IJCNN'95, 4, page 1834--1838. IEEE Computer Society, (November 1995)
W. Wang, M. Jafari, S. Sanei, and J. Chambers. Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on, (July 2003)