Dimichele, William A, et al. «A Middle Pennsylvanian (early Asturian) Tropical Dry Forest, Atokan-Desmoinesian Boundary, Illinois Basin, USA». Spanish Journal of Palaeontology, vol. 31, n.º 1, abril de 2020, pp. 41-84, doi:10.7203/sjp.31.1.17139.