1. DNAPrint Genomics Frequently Asked Questions (www.ancestrybydna.com/welcome/faq/).
2. Frudakis T., Molecular Photofitting: Predicting Ancestry and Phenotype from DNA (Academic Press, Burlington, MA, 2007).
3. Jobling M., Hurles M., Tyler-Smith C., Human Evolutionary Genetics: Origins, Peoples, and Disease (Garland Publishing, New York, 2004).
4. Origin and Diffusion of mtDNA Haplogroup X
5. The phylogeography of Y chromosome binary haplotypes and the origins of modern human populations