B. Henke, O. Sawodny, Y. Sagou, and K. Terashima. IEEE/RSJ International Conference on Intelligent Robots and Systems
(IROS); Workshop on Progress, Challenges and Future Perspectives
in Navigation and Manipulation Assistance for Robotic Wheelchairs, (2012)IROS2012 Workshops.
U. Schaper, E. Arnold, O. Sawodny, and K. Schneider. IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), page 680--685. Wollongong, Australia, (2013)