ETRI JOURNAL, vol. 40, no. 4, page. 458 - 470, 2018-08
Advanced Robotics, vol. 26, no. 8-9, page. 989 - 1012, 2012-07
Advanced Robotics, vol. 26, no. 13, page. 1495 - 1519, 2012-07
ADVANCED ROBOTICS, vol. 25, no. 9, page. 1227 - 1248, 2011-01