1. Alexander, J. 1980. The spread and development of iron-using in Europe and Africa. In Proceedings of the 8th Panafrican congress of prehistory and quaternary studies, ed. R.E. Leakey and B.A. Ogot, 327–330. Nairobi: The International Louis Leakey Memorial Institute for African Prehistory.
2. Ambrose, S.H. 1984. The introduction of pastoral adaptations to the highlands of East Africa. In From hunters to farmers: The consequences of food production in Africa, ed. J.D. Clark and S.A. Brandt, 212–239. Berkeley: University of California Press.
3. Ambrose, S.H. 1998. Chronology of the Later Stone Age and food production in East Africa. Journal of Archaeological Science 25: 377–392.
4. Badenhorst, S. 2009. Phytoliths and livestock dung at Early Iron Age sites in southern. Africa South African Archaeological Bulletin 64: 45–50.
5. Badenhorst, S. 2010. Descent of Iron Age farmers in southern Africa during the last 2000 years. African Archaeological Review 27: 87–106.