@inbook{1180941601, author={Bella J. May and Margery A. Lockard}, title={Orthoses for Ankle Impairments}, booktitle={Prosthetics & Orthotics in Clinical Practice}, publisher={F. A. Davis Company}, address={New York, NY}, year={2011}, url={fadavispt.mhmedical.com/content.aspx?aid=1180941601} }