Smith, Ray Winfield. 1949. "The Significance of Roman Glass." The Metropolitan Museum of Art Bulletin 8(2): p. 59.Dolez, A. 1988. Glass Animals. 3,500 Years of Artistry and Design. New York: H.N. Abrams, p. 22.Painter, K. and D. Whitehouse. 1990. "Recent Research on the Portland Vase: IV. Style, Date, and Place of Manufacture," JGS 32: 124 no. 10.Whitehouse, D. 1991. "Cameo Glass," in Newby, M. and K. Painter, eds., Roman Glass: Two Centuries of Art and Invention. London: The Society of Antiquaries of London, pp. 28, 32.Saldern, Axel von. 2004. Antikes Glas. Munchen: C.H. Beck, p. 216, fig. 183.Picón, Carlos A., et al. 2007. Art of the Classical World in The Metropolitan Museum of Art. New York: The Metropolitan Museum of Art, no. 391, pp. 336, 483.Picón, Carlos A. 2009. “Glass and Gold of the Hellenistic and Early Roman World.” In Philippe de Montebello and the Metropolitan Museum of Art 1977-2008, eds. James R. Houghton et al. New York: The Metropolitan Museum of Art, pp. 18-19, fig. 26.