1964, excavated by Robert H. Dyson Jr. on behalf of the Hasanlu Project sponsored by the University Museum of the University of Pennsylvania, the Archaeological Service of Iran, and The Metropolitan Museum of Art; acquired by the Museum in 1965, as a result of its financial contribution to the excavations.
Muscarella, Oscar W. 1966. "Hasanlu 1964." The Metropolitan Museum of Art Bulletin 25, p. 128, fig. 12.
Muscarella, Oscar W. 1980. The Catalogue of Ivories from Hasanlu, Iran. Hasanlu Special Studies II. University Museum Monograph 40. Philadelphia: The University Museum, University of Pennsylvania, no. 33, pp. 20-21.
Marcus, Michelle I. 1988. The Seals and Sealings from Hasanlu IVB, Iran. Ph.D. dissertation, University of Pennnsylvania. Ann Arbor: University Microfilms International #8816203, pl. 18a.
Muscarella, Oscar W. 1989. "Warfare at Hasanlu in the 9th Century B.C." Expedition 31, p. 33.
de Schauensee, Maude. 2011. Peoples and Crafts in Period IVB at Hasanlu, Iran. Hasanlu Special Studies IV, edited by Robert H. Dyson. University Museum Monograph 132. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, Appendix 1.1, HAS 64-769.