International Conference on Ubiquitous Robots and Ambient Intelligence, page. 523 - 527, 2007-11-24
IEEE Conference on Automation Science and Engineering, 2011-09-28
IEEE Robotics and Automation Society, page. 2618 - 2623, 2010-05-03
로봇공학회논문지, vol. 2, no. 4, page. 317 - 326, 2007-01