Robert Langnas, Bob. “An Introduction to Parthian Silver Fractions, the Little Anomalies of Arsacid Coinage”. KOINON: The International Journal of Classical Numismatic Studies 1 (January 1, 2018): 114–141. Accessed February 1, 2026. https://archaeopresspublishing.com/ojs/index.php/koinon/article/view/1166.