Sources

5th Century:

• Herodotus, Thucydides, Socrates, Plato, Xenophon, Kritias - the latter four were Laconophiles

4th Century:

• Aristotle

2nd Century:

• Diodorus, Polybius

1st Century AD:

• Plutarch

Plato, Xenophon and Kritias were students of Socrates. Plato, in turn, taught Aristotle