1. Rigdon JE. Rise in older drivers poses safety risk. The Wall Street Journal October 29 1993:A8.
2. US Department of Transportation Federal Highway Administration. Conference on Cardiac Disorders and Commercial Drivers. Bethesda Md; December 1987. Publication No. FHWA-MC-88-040.
3. Shephard RJ. The cardiac patient and driving: the Ontario experience. In: Conference on Cardiac Disorders and Commercial Drivers. Bethesda Md: US Department of Transportation Federal Highway Administration; December 1987:85-94.
4. Medical regulatory criteria for evaluation. Section 391.41(b)(4). Federal Register. November 23 1977; amended October 1983.