@article {1104, title = {Control approaches for robotic knee exoskeleton and their effects on human motion}, journal = {Advanced Robotics}, volume = {27}, year = {2013}, pages = {993-1002}, author = {Petri{\v c}, T. and Gams, A. and Debevec, T. and {\v Z}lajpah, L. and Babi{\v c}, J.} }