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Ted M. Townsend, Allan Larson, Edward Louis, J. Robert Macey: Molecular Phylogenetics of Squamata: The Position of Snakes, Amphisbaenians, and Dibamids, and the Root of the Squamate Tree. In: Systematic Biology. Bd. 53, Nr. 5, 2004, S. 735–757, doi:10.1080/10635150490522340, PMID 15545252.