Display bibliographic references beginning with:
[
Maddin, H. C., Sidor, C. A. and Reisz, R. R. 2008. Cranial anatomy of Ennatosaurus tecton (Synapsida: Caseidae) from the Middle Permian of Russia and the evolutionary relationships of Caseidae. Journal of Vertebrate Paleontology. Vol. 28(1), pp. 160-180.