Ken Satoh Akihiro Inokuchi Katashi Nagao Takahiro Kawamura New Frontiers in Artificial Intelligence, JSAI 2007 Conference and Workshops, Miyazaki, Japan, June 18-22, 2007, Revised Selected Papers JSAI Lecture Notes in Computer Science 4914 Springer 2008 978-3-540-78196-7 db/conf/jsai/jsai2007.html