Fifth International Conference on Advanced Robotics 'Robots in Unstructured Environments Advanced Robotics, 1991. 'Robots in Unstructured Environments', 91 ICAR., Fifth International Conference on. :769-774 vol.1 1991
EEE International Workshop on Intelligent Robots and Systems, Towards a New Frontier of Applications Intelligent Robots and Systems '90. 'Towards a New Frontier of Applications', Proceedings. IROS '90. IEEE International Workshop on. :995-1000 vol.2 1990