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 ... G. Zuntz, Political Plays of Euripides, ch. IV ... Euripides, Herakleidai, 69-71 ... Pickard-Cambridge, Theatre of Dionysus, pp. 53, 129, 131