1. (1) R. Simmons, R. Goodwin, K. Z. Haigh, S. Koenig, and J. O'Sullivan: “A Modular Architecture for Office Delivery Robots”, Autonomous Agents 1997, pp. 245-252, February (1997)
2. (2) M. Tomono and S. Yuta: “Indoor Navigation based on an Inaccurate Map using Object Recognition”, JRSJ, Vol. 22, No. 1, pp. 83-92 (2004) (in Japanese)
3. (4) T. Matsui: “Research on Autonomous Learning Functions and Jijo-2 Office Robot”, Bulletin of the Electrotechnical Laboratory, Vol. 64, No. 4-5, pp. 15-21 (2000) (in Japanese)
4. (5) Y. Hada, K. Takase, and K. Ohgaki: “Development of a Global Positioning System for Indoor Robots by Using Distributed Cameras”, The 18th Annual Conference of the Robotics Society of Japan, 2N24, pp. 889-890 (2000) (in Japanese)
5. (6) K. Takase, et al.: “Personal Mobile Robot System supported by Intelligent Infrastructure”, SICE System Integration Divison Annual Conference SI2002, 1A72, pp. 137-146 (2002) (in Japanese)