Pickard-Cambridge, Theatre of Dionysus, pp. 53, 129, 131. G. Zuntz, Political Plays of Euripides, ch. IV. Herodotos, V, 46, 2. Hesychios. Schol. Aristophanes, Knights 410. Bekker, Anecdota Graeca, I, 338, ... Agora 3 123 ... 5th A.D ... Pickard-Cambridge, Theatre of Dionysus, pp. 53, 129, 131 ... H. A. Thompson, Hesperia, XXI, 1952, pp. 92-93 ... G. Zuntz, Political Plays of Euripides, ch. IV