Harrell, T.L. & Perez-Huerta, A. & Phillips, G. (2016)
Strontium isotope age-dating of fossil shark tooth enameloid from the Upper Cretaceous Strata of Alabama and Mississippi, USA. Cretaceous Research, 62, 1–12
DOI: 10.1016/j.cretres.2016.01.011
Harrell, T.L. & Perez-Huerta, A. (2015)
Rare Earth Element (REE) Analysis of Vertebrate Fossils from the Upper Cretaceous Carbonate Marine Formations of Western and Central Alabama, USA: Taphonomic and Paleoenvironmental Implications. Palaios, 30(7), 514–528
DOI: 10.2110/palo.2014.031
Hamm, S.A. & Harrell, T.L. (2013)
A note on the occurrence of Ptychodus polygyrus (Ptychodontidae) from the Late Cretaceous of Alabama, with comments on the stratigraphic and geographic distribution of the species. Bulletin of the Alabama Museum of Natural History, 31(1), 105–113