@inbook{55795913, author={John E. Duda}, editor={Watts, Ray L. and Standaert, David G. and Obeso, Jose A.}, title={Chapter 19. Parkinson's Disease: Neuropathology}, booktitle={Movement Disorders, 3e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessphysiotherapy.mhmedical.com/content.aspx?aid=55795913} }