1. Where is the Intelligence in Intelligent Control?;Astrom;IEEE control Systems Magazine,1991
2. A Layered Intelligent Control System for a Mobile Robot;Brooks,1985
3. Task and Path Planning for Mobile Robots;Chatila,1986
4. A Robust Ultrasonic 3-D Position Sensor with High Accuracy and Long Operating Sensor with High Accuracy and Long Operating Range;Doussis,1993
5. Sonar-Based Real-World Mapping and Navigation;Elfes;IEEE Journal of Robotics and Automation,1987