J.  Shultz, Mathijssen, G., Vanderborght, B., and Bicchi, A., ?A Selective Recruitment Strategy for Exploiting Muscle-Like Actuator Impedance Properties?, in IEEE International Conference of Intelligent Robots and Systems - IROS2015, Hamburg, Germany, 28 Sept - 2 Oct 2015, 2015, pp. 2231-2237.