ASIA Vibration Conference, page. 659 - 664, 1989-01-01
AAAI Spring Symposium on Robot Navigation, page. 57 - 60, 1989-01-01
VI Int. Congress on Experimental, page. 128 - 133, 1988-01-01
14th proc.of NAMRC, Univ.of Minnesota, Minneapolis, page. 471 - 478, 1986-01-01