The following publications are possibly variants of this publication:
- Variable Structure Control of a Differentially Steered Wheeled Mobile RobotYulin Zhang, Jae Heon Chung, Steven A. Velinsky. jirs, 36(3):301-314, 2003. [doi]
- Control of a redundant, reconfigurable ball wheel drive mechanism for an omnidirectional mobile platformYoung-Chul Lee, Danny V. Lee, Jae Heon Chung, Steven A. Velinsky. robotica, 25(4):385-395, 2007. [doi]