1. Healy, J. F., Congrès Intern. de Numismatique, Actes II, 529 (1957).
2. Herodotus, I., 50, 2 (λɛνκòς χρνσóς).
3. Strabo, XI, ii, 19, and Isidorus, Origines XVI, xxiv.
4. Pliny, Natural History, XXXIII, 80, and Isidorus, ibid. (χρνσíoν ηλɛκτρoν, and electrum).
5. Inscriptiones Graecae, XII (2), 1; Tod, M. N., Greek Historical Inscriptions, II, 112.