1. "[1] Oddy, W.A, Archibald, M.M, The technique of some forged medieval silver pennies, Scientific studies in Numismatics, British Museum Publications, London.1980.
2. [2] Jones, J.M. Epigraphical Notes on the Hellenistic Bronze Coinage, The Numismatic Chronicle 7 (12), 1972. pp. 39-43.
3. [3] Caley, E., Chemical composition of Parthian coins, numismatic note and monographs, American Numismaic Sociaty 129, 1995.pp. 1-49 .
4. [4] Thompson, F.C, Chattergee, A.K., Anceint Greek plated coins, Nature, 168.,1951.pp. 158.
5. [5] Campbell, W., Greek and Roman Plated Coins, American Numismatic Society, 57. 1933.