Husak, Jerry F.; Mcguire, Jimmy Adair (2014). "Does 'gliding while gravid' explain Rensch's rule in flying lizards?". Biological Journal of the Linnean Society. 113: 270–282. doi:10.1111/bij.12319. "Similarly, in some Draco it has been suggested that females have larger heads for their body size than males to counterbalance an increased weight burden that is displaced posteriorly during gravidity."
Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Draco beccarii, p. 21).