See A. Grabar, “Recherches sur les sources Juives de l’art paléochrétien,” Cahiers archéologiques 12 (1962), p. 118 and H. Stern; “Orphée dans l’art paléochrétien,” pp. 12–16 with the trenchant critique of M.C. Murray, “Rebirth and Afterlife: A Study of the Transmutation of Some Pagan Imagery in Early Christian Art,” British Archaeological Reports, International Series 100 (1981), pp. 114–121.