Project 463: A. K. Huttenlocker, J. D. Pardo, B. J. Small, J. S. Anderson. 2013. Cranial morphology of recumbirostrans (Lepospondyli) from the Permian of Kansas and Nebraska, and early morphological evolution inferred by micro-computed tomography. Journal of Vertebrate Paleontology. 33 (3):540-552.