Global status report on road safety. http://www.who.int/violence_injury_prevention/road_safety_status/2015/en/ Accessed May 10, 2017.
R.Adams Cowley, F. Hudson, E. Scanlan, W. et al: An economical and proved helicopter program for transporting the emergency critically ill and injured patient in Maryland. J Trauma 1973; 13: 1029-1038.
Howard R. Champion, Augenstein JS, Blatt AJ, et al: New tools to reduce deaths and disabilities by improving emergency care. Champion, 05-0191. http://www-nrd.nhtsa.dot.gov/pdf/esv/esv19/05-0191-W.pdf#search='new+tools+to+reduce+deaths+and+disabilities'