Concern: Ferno Group Companies, Manual Instruction Patient Transport System – Mondial, United States.

	Concern: Stem Emergency System, Technikal Manual: Hydropneumatic Stretcher Support, Italy.

	Sherwood H.B., Donze A., Giebe J., Mechanical Vibration in Ambulance Transport, Journal of Obstetric Gynecologic & Neonatal Nursing, Vol. 23(6), 1994, 457-463.