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Vargas-Ramirez M, Vences M, Branch WR, Daniels SR, Glaw F, Hofmeyr MD, Kuchling G, Maran J, Papenfuss TJ, Siroký P, Vieites DR, Fritz U. (July 2010). "Deep genealogical lineages in the widely distributed African helmeted terrapin: Evidence from mitochondrial and nuclear DNA". Molecular Phylogenetics and Evolution. 56: 428–440. doi:10.1016/j.ympev.2010.03.019. PMID20332032.CS1 maint: multiple names: authors list (link)