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: p.153, no.117, p. C4, pl. 13
Berges, Dietrich K. Antike Siegel und Glasgemmen der Sammlung Maxwell Sommerville: im University of Pennsylvania Museum of Archaeology and Anthropology. Mainz am Rhein: Verlag Philipp von Zabern, 2002. Page/Fig./Plate: 78 See: p. 24, no. 15, taf. II; taf. 5
Vermeule, Cornelius C. The Sommerville Gem Collection of the University Museum of Archaeology and Anthropology. The University Museum, 1956. See: no. 72