1. Fowler NO: Pre-infarctional angina: A need for an objective definition and for a controlled clinical trial of its management. Circulation 44: 755–57, 1971.
2. Fischl SJ, Herman MV and Gorlin R: The intermediate coronary syndrome: Clinical, angiographic, and therapeutic aspects. New Engl J Med 288: 1193–98, 1973
3. Cohn PF and Cohn LH: The medical/surgical treatment of unstable angina. In Cohn LH (Ed), The Treatment of Acute Myocardial Ischemia: An Integrated Medical/Surgical Approach, Futura Publishing Co., Mt. Kisco, New York, 1979, pp 93–126.
4. Hactcher CR Jr. King SB III and Kaplan JA: Surgical management of unstable angina. World J Surg 2: 689–700, 1978
5. Weisel RD, Cusimano RJ, Teasdale SJ, Goldman BS and Baird RJ: Mycardial protection during surgery for unstable angina. In Adelman AG and Goldman BS (Eds), Unstable Angina: Recognition and Management, PSG Publishing Co., Littleton, Mass., 1981, pp 191–204.