↑William G. Boltz, Early Chinese Writing, World Archaeology, Vol. 17, No. 3, Early Writing Systems. (Feb. 1986), pp. 420–436 (436).
↑David N. Keightley, "Art, Ancestors, and the Origins of Writing in China", Representations, No. 56, Special Issue: The New Erudition. (Autumn, 1996), pp. 68–95 (68).