Reference

Nicola J. Mitchell, Nicola J. Nelson, Alison Cree, Shirley Pledger, Susan N. Keall, Charles H. Daugherty (2006): Support for a rare pattern of temperature-dependent sex determination in archaic reptiles: evidence from two species of tuatara (Sphenodon) – Frontiers in Zoology – 2006: 0001-9-0012.