Seung Yeol Lee Kye Young Lee Sang Heon Lee Jin Woo Kim Chang-Soo Han Human-robot cooperation control for installing heavy construction materials. 305-319 2007 22 Auton. Robots 3 http://dx.doi.org/10.1007/s10514-006-9722-z db/journals/arobots/arobots22.html#LeeLLKH07