[by] Hiroshi Hirai, Kazuo Murota, Masaki RikitokuDept. of Mathematical Informatics, Graduate School of Information Science and Technology, the University of Tokyo2005.8<MA21-B184>
[by] Hiroshi Hirai, Kazuo Murota, Masaki RikitokuDept. of Mathematical Informatics, Graduate School of Information Science and Technology, the University of Tokyo2004.8<MA21-B65>