RAYMOND, E. S. The Cathedral and the Bazaar. http://www.catb.org/esr/writings/cathedralbazaar/
SAITO, M. Semantic object search in large-scale indoor environments. IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Workshop on Active Semantic Perception and Object Search in the Real World, 2011. 2011
QUIGLEY, M. Stair : Hardware and software architecture. AAAI 2007 Robotics Workshop. 2007, 31-37