Rootsi S, Magri C, Kivisild T et al. 2004. Phylogeography of Y-chromosome haplogroup I reveals distinct domains of prehistoric gene flow in europe. Am. J. Hum. Genet. 75 (1), p. 128–37. Abstract. PMID 15162323.
Mendez F., Krahn T., et al., 2013. An African American paternal lineage adds an extremely ancient root to the human Y chromosome phylogenetic tree. American Journal of Human Genetics 92 (3), p. 454–9. PMID 23453668.
Rootsi S, Magri C, Kivisild T et al. 2004. Phylogeography of Y-chromosome haplogroup I reveals distinct domains of prehistoric gene flow in europe. Am. J. Hum. Genet. 75 (1), p. 128–37. Abstract. PMID 15162323.