1. Alase , A. O. 2012 Gamma spectrometry and geochemical investigation of the Mississippian (Chesterian) Fayetteville Shale and Imo Shale, Arkoma Basin, Arkansas Oklahoma State University 138
2. THE CRANIAL ANATOMY OF CHLAMYDO-SELACHUS ANGUINEUS
3. A Physonemus spine from the Pennsylvanian of West Virginia;Baird;Journal of Paleontology,1957