For instance, P. Bagatti; “Il musaico dell’ Orfeo a Gerusalemme,” pp. 145–146; H. Stern, “La mosaique d’Orphée de Blanzy-les-Fismes (Aisne),” Gallia 13 (1955), pp. 41–77, esp. pp. 74–75; A. Grabar, Byzantium from the Death of Theodosius to the Rise of Islam (London: Thames and Hudson, 1966), p. 112.