Gregory M. Erickson, A. Kristopher Lappin, Peter Larson. Androgynous rex – The utility of chevrons for determining the sex of crocodilians and non-avian dinosaurs. „Zoology”. 108 (4), s. 277–286, 2005. DOI: 10.1016/j.zool.2005.08.001. PMID: 16351976. (ang.).
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Gregory M. Erickson, A. Kristopher Lappin, Peter Larson. Androgynous rex – The utility of chevrons for determining the sex of crocodilians and non-avian dinosaurs. „Zoology”. 108 (4), s. 277–286, 2005. DOI: 10.1016/j.zool.2005.08.001. PMID: 16351976. (ang.).