Gieser, R. & Shell, R. & Thomas, M.J. & Davis, M. (2023)
First records of the chondrichthyans Heslerodus and Ossianodus from the Upper Pennsylvanian LaSalle Limestone (Bond Formation) of northern Illinois. Kentiana, 5, Article 1439
DOI: 10.21900/j.kentiana.n.1439

Amadori, M. & Solonin, S.V. & Vodorezov, A.V. & Shell, R. & Niedzwiedzki, R. & Kriwet, J. (2022)
The extinct shark, Ptychodus (Elasmobranchii, Ptychodontidae) in the Upper Cretaceous of central-western Russia. - The road to easternmost peri-Tethyan seas. Journal of Vertebrate Paleontology, 42(2), Article e2162909
DOI: 10.1080/02724634.2022.2162909