1. NHTSA. U.S. DOT Fourth Report to Congress: effectiveness of occupant restraint systems and their use; 1999.
2. NHTSA. U.S. DOT Fifth/Sixth Report to Congress: effectiveness of occupant restraint systems and their use, DOT HS 809 442; November 2001.
3. 2002 SAE Handbook;SAE Recommended Practice J2249 wheelchair tiedown and occupant restraint systems for use in motor vehicles,1999
4. ANSI/RESNA 2000: Section 19 of ANSI/RESNA Wheelchair Standards/Volume 1, Wheelchairs for use as seats in motor vehicles. Arlington (VA): Rehabilitation Engineering and Assistive Technology Society of North America.