• [Wiki] http://en.wikipedia.org/wiki/Tyrannosaurus_rex.
• [Learning] http://www.enchantedlearning.com/subjects/dinosaurs/anatomy/Repro.shtml.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [RogeWhit2016] Rogers, K. C., Whitney, M., D'Emic, M., and Bagley, B. (2016). Precocity in a tiny titanosaur from the cretaceous of Madagascar. Science, 352:450--453.