Murray, A. M.; Brinkman, D. B.; DeMar, D. G.; Wilson, G. P. (2020). Paddlefish and sturgeon (Chondrostei: Acipenseriformes: Polyodontidae and Acipenseridae) from lower Paleocene deposits of Montana, U.S.A. Journal of Vertebrate Paleontology. 40(2): e1775091.