H. Herr and N. Langman. Optimization of human-powered elastic mechanisms for endurance amplification, Structural Optimization, vol. 13, no. 1, pp. 65–67, Feb. 1997.

H. M. Herr, G. T. Huang, and T. A. McMahon. A model of scale effects in mammalian quadrupedal running, Journal of Experimental Biology, vol. 205, no. 7, pp. 959-967, 2002.

H. M. Herr. Multidisciplinary approaches to limb loss: A chain of events leading to a single step, Journal of Rehabilitation Research and Development, White House/VA Conference, Emerging Technologies, Washington, D.C., pp. 76-80, Oct. 2004.

M. Popovic and H.M. Herr. Global motion control and support base planning, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Edmonton, Canada, Aug. 2005.