HowgegoC. J., Greek Imperial Countermarks: Studies in the Provincial Coinage of the Roman Empire (Royal Numismatic Society, special publication XVII). London: Royal Numismatic Society, 1985. Pp. xi + 319, 33 pls, 36 maps, ISBN 0-901405-23-X
Mitchell, Stephen
Journal of Roman Studies, 1987, Vol.77, p.219-219 [Periódico revisado por pares]Cambridge, UK: Cambridge University Press
Texto completo disponível