Allen, D. Catalogue of the Celtic Coins in the British Museum. (London, 1987-1995).
Volume 1: Silver Coins of the East Celts and Balkan Peoples. (London, 1987).
Volume 2: Silver Coins of North Italy, South and Central France, Switzerland and South Germany. (London, 1990).
Volume 3: Bronze Coins of Gaul. (London, 1995).
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