1. Abramson, D. J.: Physiology of sympathetic innervation of peripheral blood vessels. In: S. S. Samuels, Diagnosis and Treatment of Vascular Disorders (Angiology). Baltimore: Williams & Wilkins Co. 1956.
2. Altschul, R.: Selected Studies on Arteriosclerosis. Springfield (Ill.): Ch. C. Thomas 1950.
3. Altschul, R.: Endothelium: Its Development, Morphology, Function and Pathology. New York: Macmillan Co. 1954.
4. Anrep, G. V., and E. V. Saalfeld: The blood flow through the skeletal muscle in relation to its contraction. J. Physiol. (Lond.) 85, 375 (1935).
5. Aschoff, J.: Die Extremitäten als Effektoren der physikalischen Temperaturregulation. Wien. med. Wschr. 108, 404 (1958).