Dong Hun Shin Ho Joong Kim Hogil Lee Hong-Seok Kim 0001 Omni-Directional Self-Propulsive Troweling Robot. 2689-2696 1998 conf/icra/1998 ICRA db/conf/icra/icra1998-3.html#ShinKLK98 http://dx.doi.org/10.1109/ROBOT.1998.680752