Justice, C. M., Den, Z., Nguyen, S. V., Stoneking, M., Deininger, P. L., Batzer, M. A., et al. (2001). Phylogenetic analysis of the Friedreich ataxia GAA trinucleotide repeat. Journal of Molecular Evolution, 52(3), 232-238. doi:10.1007/s002390010151.