Diogenes Laertius, II, xiii, 122. Socr. Epist. 13, Hercher, Epistolographi Graeci, p. 618. Plutarch, maxime cum principibus viris philosopho esse disserendum, 1. Plato, Gorgias, 491a. Hesperia, 20, 1951, ... Agora 14 174 ... Thorikos, 1963, I, Bruxelles, 1968, pp. 87ff., Le quartier industriel, H. Mussche ... L' Antiquité classique, XXXIV, 1965, pp. 5ff ... Hesperia, 20, 1951, pp. 135-288
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