Balog, Paul. The Fatimid Glass Jeton.Naples, 1974-75 121, Rogers, Edward Thomas. "Glass, As a Material for Standard Coin Weights," NC N.S. 13 (1873)., p.64, no.8
Rogers, Edward Thomas. "Glass, As a Material for Standard Coin Weights," NC N.S. 13 (1873). ,p.64, no.12, like Balog, Paul. The Fatimid Glass Jeton.Naples, 1974-75 139