1. Biaggioni I, Burnstock G, Low PA, Paton JFR, editors. Primer on the autonomic nervous system. 3rd ed. San Diego: Academic; 2012.
2. Buijs RM, Swaab D, editors. Handbook of clinical neurology. Autonomic nervous system, vol. 117. New York: Elsevier; 2013.
3. Low PA, Engstrom JW. Disorders of the autonomic nervous system. In: Kasper D, Fauci A, Hauser S, Longo D, Jameson JL, Loscalzo J, editors. Harrison’s principles of internal medicine. 19th ed. New York: McGraw-Hill Education; 2015.
4. Sandroni P. Chapter 78 – Clinical evaluation of autonomic disorders. In: Biaggioni I, Burnstock G, Low PA, Paton JFR, editors. Primer on the autonomic nervous system. Third ed. San Diego: Academic; 2012. p. 377–82.
5. Ropper AH, Samuels MA, Klein JP. Chapter 26. Disorders of the autonomic nervous system, respiration, and swallowing. In: Adams and Victor’s principles of neurology. 10th ed. New York: The McGraw-Hill Companies; 2014.