PT Unknown AU Lategahn, H Geiger, A Kitt, B TI Visual SLAM for autonomous ground vehicles SE 2011 IEEE International Conference on Robotics and Automation (ICRA), Shanghai, China, May 9-13, 2011 PY 2011 BP 1732 EP 1737 DI 10.1109/ICRA.2011.5979711 LA english ER