Knight, Alec; Underhill, Peter A.; Mortensen, Holly M.; Zhivotovsky, Lev A.; Lin, Alice A.; Henn, Brenna M.; Louis, Dorothy; Ruhlen, Merritt; Mountain, Joanna L. African Y chromosome and mtDNA divergence provides insight into the history of click languages (англ.) // Current Biology : journal. — Cell Press, 2003. — Vol. 13, no. 6. — P. 464—473. — doi:10.1016/S0960-9822(03)00130-1. — PMID12646128.
Naidoo T., Schlebusch C. M., Makkan H., Patel P., Mahabeer R., Erasmus J. C., Soodyall H. Development of a single base extension method to resolve Y chromosome haplogroups in sub-Saharan African populations (англ.) // Investigative Genetics : journal. — 2010. — Vol. 1, no. 1. — P. 6. — doi:10.1186/2041-2223-1-6. — PMID21092339. — PMC2988483.
Knight, Alec; Underhill, Peter A.; Mortensen, Holly M.; Zhivotovsky, Lev A.; Lin, Alice A.; Henn, Brenna M.; Louis, Dorothy; Ruhlen, Merritt; Mountain, Joanna L. African Y chromosome and mtDNA divergence provides insight into the history of click languages (англ.) // Current Biology : journal. — Cell Press, 2003. — Vol. 13, no. 6. — P. 464—473. — doi:10.1016/S0960-9822(03)00130-1. — PMID12646128.
Naidoo T., Schlebusch C. M., Makkan H., Patel P., Mahabeer R., Erasmus J. C., Soodyall H. Development of a single base extension method to resolve Y chromosome haplogroups in sub-Saharan African populations (англ.) // Investigative Genetics : journal. — 2010. — Vol. 1, no. 1. — P. 6. — doi:10.1186/2041-2223-1-6. — PMID21092339. — PMC2988483.