↑Hansen, Mogens Herman & Nielsen, Thomas Heine: An Inventory of Archaic and Classical Poleis, s. 794–809. (An Investigation Conducted by The Copenhagen Polis Centre for the Danish National Research Foundation) Oxford: Oxford University Press, 2004. ISBN 0-19-814099-1(englanniksi)
↑Smith, William: ”Pieres”, Dictionary of Greek and Roman Geography. Boston: Little, Brown and Company, 1854. Teoksen verkkoversio. (englanniksi)