1. Anfray, F. (1974). Deux villes Axoumites: Adoulis et Matara. Atti IV Congresso Internationale di Studi Etiopici, Accademia Nazionale dei Lincei, Rome.
2. Bahru, Z. (1995). A History of Modern Ethiopia 1855–1974, James Currie, London.
3. Bard, K. A., and Fattovich, R. (2001). Some remarks on the process of state formation in Egypt and Ethiopia. In Yamauchi Edwin, M. (ed.), Africa and Africans in Antiquity, Michigan State University Press, East Lansing, pp. 276–290.
4. Barrett, J. C. (1988). Fields of discourse reconstituting a social archaeology. Critique of Anthropology 7(3): 5–16.
5. Barrett, J. C. (1994). Fragments from antiquity, Blackwell, Oxford.