The Die-Studies Database (DSD) aims .
The Greek Overstrikes Database (GOD) aims .
References
- ^ Buttrey, Theodore V. (1993), "Calculating ancient coin production : facts and fantasies," Numismatic Chronicle, 153, p. 335-351
- ^ Callataÿ, François de (1995), "Calculating ancient coin production : Seeking a balance," Numismatic Chronicle, 155, p. 40-54.