박형배, 유환신, 임종한. (2003). 유압 비례 위치제어 시스템의 적응 마찰보상. 한국기계기술학회지, 5(2), 113-118.
Hyung-Bae Park, Hwan-Sin Yu, Jong-Hwan Yim. (2003). Adaptive Friction Compensation of a Hydraulic Proportional Position Control System. Journal of the Korean Society of Mechanical Technology, 5(2), 113-118.