[94] Plat. Euthydem. pp. 283, 284 (pp. 416-418).
[95] Ibid. p. 298 (p. 446).
[96] Xenoph. Memorab. II. c. 1, § 21 seq.
[97] Diog. Laert. IX. 50.
[98] Ibid. 54.
[99] Plat. Protag. p. 338 fin. (p. 204).
[100] Plutarch in Pericle, c. 36.
[101] Diog. Laërt. IX. 51, 52; 55, 56 (Sext. Empir. adv. Math. IX. 56).
[102] Plat. Theætet. p. 152 (p. 195); Sext. Emp. Pyrrh. Hyp. I, c. 32, § 216.
[103] Sext. Empir. adv. Math. VII. 388, 60; Plat. Theætet. p. 152. (p. 195-197).