Rilly 2016. Rilly, Claude (2016). "The Wadi Howar Diaspora and its role in the spread of East Sudanic languages from the fourth to the first millennia BCE". Faits de Langues. 47 (1): 151–163. doi:10.1163/19589514-047-01-900000010. S2CID134352296.
Hassan et al. 2008, pp. 316–323. Hassan, Hisham Y.; Underhill, Peter A.; Cavalli-Sforza, Luca L.; Muntaser, E. Ibrahim (2008). "Y-Chromosome Variation Among Sudanese: Restricted Gene Flow, Concordance With Language, Geography, and History". American Journal of Physical Anthropology. 137 (3): 316–323. doi:10.1002/ajpa.20876. PMID18618658.
Hassan et al. 2008, pp. 316–323. Hassan, Hisham Y.; Underhill, Peter A.; Cavalli-Sforza, Luca L.; Muntaser, E. Ibrahim (2008). "Y-Chromosome Variation Among Sudanese: Restricted Gene Flow, Concordance With Language, Geography, and History". American Journal of Physical Anthropology. 137 (3): 316–323. doi:10.1002/ajpa.20876. PMID18618658.
Rilly 2016. Rilly, Claude (2016). "The Wadi Howar Diaspora and its role in the spread of East Sudanic languages from the fourth to the first millennia BCE". Faits de Langues. 47 (1): 151–163. doi:10.1163/19589514-047-01-900000010. S2CID134352296.
Forde & James 1999. Forde, Cyril Daryll; James, Wendy (1999). Forde, Cyril Daryll (ed.). African worlds: studies in the cosmological ideas and social values of African peoples. Classics in African Anthropology. International African Institute (2nd ed.). Hamburg: LIT Verlag. ISBN0-85255-286-6. OCLC40683108.