8Manfred G Raschke. New Studies in Roman Commerce with the East. p. 604. in Aufstieg und Niedergang der Romischen Welt Ⅱ (Principat), vol. 9. 2 ,Berlin/N Y. 1976 .ed. by H Temponni. pp. 622-623.
9G P Hudson,Europe and Ctdna , Boston, 1931, pp. 120- 121.