Garland, Emily M.; Hooper, William B.; Robertson, David (2013-01-01). Swaab, Ruud M. Buijs and Dick F.. ed. “Chapter 20 - Pure autonomic failure”. Handbook of Clinical Neurology (Elsevier) 117: 243–257. doi:10.1016/b978-0-444-53491-0.00020-1. ISBN9780444534910. PMID24095130.
Garland, Emily M.; Hooper, William B.; Robertson, David (2013-01-01). Swaab, Ruud M. Buijs and Dick F.. ed. “Chapter 20 - Pure autonomic failure”. Handbook of Clinical Neurology (Elsevier) 117: 243–257. doi:10.1016/b978-0-444-53491-0.00020-1. ISBN9780444534910. PMID24095130.