Royal Mint's website Current UK Coins (页面存档备份,存于互联网档案馆) – Royal Mint Museum Obsolete UK Coins (页面存档备份,存于互联网档案馆) – Royal Mint Museum Coin Designs — Royal
(原始内容存档于2013-12-02). Latvia begins minting euro coins. 拉脫維亞銀行. 2013-07-31 [2014-05-16]. (原始内容存档于2014-04-19). On Latvia's first 2€ coin of special design. 拉脫維亞銀行. 2013-03-28
Francis (1906), Historical Greek Coins. , London : Archibald Constable and Co. Jenkins, H.K. (1990), Ancient Greek Coins, Seaby, ISBN 1-85264-014-6 Kayhan