@inbook{1180940261,
author={Bella J. May and Margery A. Lockard},
title={Biomechanical Principles in Prosthetics and Orthotics},
booktitle={Prosthetics & Orthotics in Clinical Practice},
publisher={F. A. Davis Company},
address={New York, NY},
year={2011},
url={fadavispt.mhmedical.com/content.aspx?aid=1180940261}
}