• Anaximander of Melitus (BEA)
• Cratylus, Follower of Heraclitus (EPD)
• Heraclitus of Ephesus (EPD)
• Heraclitus of Ephesus (BEA)
• Monarchianism (ECOLE)
• Plato's Life (EPD)
• Pythagoras and the Pythagoreans (EPD)

BEA = Biographical Encyclopedia of Astronomers
ECOLE = Early Church Online Encyclopedia Initiative
EPD = Exploring Plato's Dialogues