. Pausanias. Pindar, Pythian Odes , Pythian 4: For Arcesilas of Cyrene Chariot Race 462 BC. See original text in the Perseus program . Plato, Apology . See original text in Perseus program . Plato, Theaetetus . See original text in Perseus program . Secondary sources Ackerman, Robert (1991—Reprint edition). "Introduction".