1. Remote Agent: to boldly go where no AI system has gone before;Muscettola;Artif Intell,1998
2. Advanced automation for space, missions;Freitas,1980
3. Proc. Symp. Human factors in automated and robotic space systems, commission on behavioral and social sciences and education,1987
4. Autonomy and the human element in space, report of the 1983 NASA/ASEE summer faculty workshop;Johnson,1983
5. http://robotics.jaxa.jp/i-sairas2010/index.htm.