K. Akama, E. Nantajeewarawat, and H. Koike. ICSECS (3), volume 181 of Communications in Computer and Information Science, page 702-716. Springer, (2011)
S. Koike, K. Osawa, S. Kon, and M. Takahashi. AAAI Spring Symposium: Multidisciplinary Collaboration for Socially Assistive Robotics, page 25-26. AAAI, (2007)