Huffman, Thomas N. (2008). „Climate change during the Iron Age in the Shashe-Limpopo Basin, southern Africa”. Journal of Archaeological Science. 35 (7): 2032—2047. doi:10.1016/j.jas.2008.01.005.
Collett, D. P.; Vines, A. E.; E. G. Hughes (1992). „The chronology of the Valley Enclosures: implications for the interpretation of Great Zimbabwe”. African Archaeological Review. 10: 139—161. S2CID162352596. doi:10.1007/BF01117699.
Collett, D. P.; Vines, A. E.; E. G. Hughes (1992). „The chronology of the Valley Enclosures: implications for the interpretation of Great Zimbabwe”. African Archaeological Review. 10: 139—161. S2CID162352596. doi:10.1007/BF01117699.