1. Slugg MF, Morley JE, Elson MK, et al: Impotence in medical clinic outpatients. JAMA 249 (13): 1736–1740, 1983
2. Crosby EC, Humphrey T, Lauer EQ, et al: Correlative Anatomy of the Nervous System. New York, MacMillan, 1962
3. Appenzeller, O: The Autonomic Nervous System. New York, North Holland, 1976
4. Brodal A: Neurological Anatomy. New York, Oxford University Press, 1981
5. Yakovlev PI: Motility, behavior and the brain. ] Nerv Ment Dis 104 (4): 313–335, 1948