1. See James М. Robinson (ed.), The Nag Hammadi Libraiy, E. J. Brill, Leiden and New York, 1988, Asclepius, p. 330 ff.
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2. F. L. Cross and E. A. Livingstone (eds.), The Oxford Dictionary of the Christian Church, Oxford University Press, Oxford, 1988, p. 1100.
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3. W. K. C. Guthrie,A History of Greek Philosophy IV: Plato: The Man and his Dialogues, Earlier Period, Cambridge University Press, Cambridge, 1998, p. 22.