D. R.  Frost, Rodrigues, M. T., Grant, T., and Titus, T. A., ?Phylogenetics of the lizard genus Tropidurus (Squamata : Tropiduridae : Tropidurinae): Direct optimization, descriptive efficiency, and sensitivity analysis of congruence between molecular data and morphology?, Molecular Phylogenetics and Evolution, vol. 21, pp. 352-371, 2001.