See:
- Luisa Banti, Etruscan cities and their culture, London 1973, pp.128 ff.
- Nancy Thompson de Grummond, Lisa Pieraccini eds. Caere, University of Texas Press, 2016, diff
- A. L. F., Jr. “Vetulonia and Early Italic Archæology.” The American Journal of Archaeology and of the History of the Fine Arts, vol. 4, no. 2, 1888, pp. 175–180