Daroff R, Fenichel G, Jankovic J, Mazziotta J. 2012. Bradley's neurology in clinical practice [6th ed.].
Cecil RL, Goldman L, Schafer AI. 2012. Goldman's Cecil medicine (24th ed.) Philadelphia: Elsevier/Saunders.
National Institutes of Health. National Institute of Neurological Disorders and Stroke. Traumatic brain injury. http://www.ninds.nih.gov/disorders/tbi/tbi.htm. April 2014.
US Department of Health & Human Services. Agency for Healthcare Research and Quality. National and regional estimates on hospital use for all patients from the HCUP nationwide inpatient sample. http://hcupnet.ahrq.gov/HCUPnet.jsp. 2011. Accessed April 9, 2014.