E. André, G. Herzog, and T. Rist. RoboCup-97: Robot Soccer World Cup I, volume 1395 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (1998)
M. Araki, and Y. Funakura. Spoken Dialogue Systems for Ambient Environments: Second International Workshop, IWSDS 2010, Gotemba, Shizuoka, Japan, volume 6392 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2010)