1. Alencar, L. R., Quental, T. B., Grazziotin, F. G., Alfaro, M. L., Martins, M., Venzon, M., & Zaher, H. (2016). Diversification in vipers: Phylogenetic relationships, time of divergence and shifts in speciation rates. Molecular Phylogenetics and Evolution, 105, 50–62. https://doi.org/10.1016/j.ympev.2016.07.029
2. Baig, K. J., & Masroor, R. (2008). The snakes of the genus Spalerosophis JAN, 1865 in IndoPakistan and Iran. Herpetozoa, 20, 109–115.
3. Bons, J., Geniez, P., Montori, A., & Roca, V. (1996). Amphibiens et reptiles du Maroc (Sahara occidental compris): atlas biogéographique. Asociacion herpetologica espanola, p. 320.
4. Boulenger, G. A. (1893). Catalogue of the snakes in the British Museum (Natural History). Taylor & Francis, p. 73.
5. Burbrink, F. T., Lawson, R., & Slowinski, J. B. (2000). Mitochondrial DNA phylogeography of the polytypic North American rat snake (Elaphe obsoleta): A critique of the subspecies concept. Evolution, 54, 2107–2118. https://doi.org/10.1111/j.0014-3820.2000.tb01253.x