"The Origin, early history and diversification of lepidosauromorph reptiles". New Aspects of Mesozoic Biodiversity. Lecture Notes in Earth Sciences. 132. 2010. ss. 27-44. doi:10.1007/978-3-642-10311-7_2. ISBN978-3-642-10310-0.
Jones (2009). "Dentary Tooth Shape in Sphenodon and Its Fossil Relatives (Diapsida: Lepidosauria: Rhynchocephalia)". Frontiers of Oral Biology. 13: 9-15. doi:10.1159/000242382. ISBN978-3-8055-9229-1. PMID19828962.
Hay (June 2010). "Genetic diversity and taxonomy: a reassessment of species designation in tuatara (Sphenodon: Reptilia)". Conservation Genetics. 11 (3): 1063-1081. doi:10.1007/s10592-009-9952-7.
Jones (2009). "Dentary Tooth Shape in Sphenodon and Its Fossil Relatives (Diapsida: Lepidosauria: Rhynchocephalia)". Frontiers of Oral Biology. 13: 9-15. doi:10.1159/000242382. ISBN978-3-8055-9229-1. PMID19828962.