Turfa, Jean M. Catalogue of the Etruscan Gallery of the University of Pennsylvania Museum of Archaeology and Anthropology. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, 2005. See: pp. 226-227, no. 242
Warden, P. G., and Jocelyn P. Small. "Amber, Ivory, and the Diffusion of the Orientalizing Style along the Adriatic Coast: Italic Amber in the University Museum (Philadelphia), in Murlo and the Etruscans: Art and Society in Ancient Etruria." In Murlo and the Etruscans: Art and Society in Ancient Etruria, by Richard D. De Puma and Jocelyn P. Small, 134-143. Madison: University of Wisconsin Press, 1994. See: pp. 135-136, no. 3, figs. 13.7-9