Dvorjetski, “The Coins of Gadara as Historical Documents and their Affinity to the Baths of Hammat-Gader,” Zion 58 (1993), pp. 388–389 (Hebrew); Martin Henig and Mary Whiting, Engraved Gems from Gadara in Jordan: The Sa’d Collection of Intaglios and Cameos (Oxford: Oxford University Committee on Archaeology, 1987), pp. 18–19, 27–28.