Adalsteinsson, S. A., W. R. Branch, S. Trape, L. J. Vitt, and S. B. Hedges. “Molecular Phylogeny, Classification, and Biogeography of Snakes of the Family Leptotyphlopidae (Reptilia, Squamata)”. Zootaxa, vol. 2244, no. 1, Oct. 2009, pp. 1–50, doi:10.11646/zootaxa.2244.1.1.