Becker, M.A. & Chamberlain, J.A. & Terry, D.O. (2004)
Chondrichthyans from the Fairpoint Member of the Fox Hills Formation (Maastrichtian), Meade County, South Dakota. Journal of Vertebrate Paleontology, 24(4), 780–793
DOI: 10.1671/0272-4634(2004)024[0780:CFTFMO]2.0.CO;2
Becker, M.A. & Chamberlain, J.A. & Wolf, G.E. (2006)
Chondrichthyans from the Arkadelphia Formation (Upper Cretaceous: upper Maastrichtian) of Hot Spring County, Arkansas. Journal of Paleontology, 80(4), 700–716
DOI: 10.1666/0022-3360(2006)80[700:CFTAFU]2.0.CO;2