A. Nomura, K. Michishita, S. Uchida, and M. Suzuki. Proceedings of the Seventh International Conference on Document Analysis
and Recognition, (ICDAR2003), 1, page 126--130. ieeeaddr, ieee, (August 2003)
K. Dill, J. Herzog, and M. Perkowski. Communications, Computers and Signal Processing,
PACRIM 1997, 2, page 823--826. Victoria, BC, Canada, (20-22 August 1997)