Middle and Late Pennsylvanian cyclothems, American Midcontinent: Ice-age environmental changes and terrestrial biotic dynamicsDOI: info:10.1016/j.crte.2014.03.008v. 346No. 7-8Elsevier159–168
Cecil, C. Blaine, DiMichele, William A., and Elrick, Scott D. 2014. "Middle and Late Pennsylvanian cyclothems, American Midcontinent: Ice-age environmental changes and terrestrial biotic dynamics." Comptes Rendus Geoscience, 346, (7-8) 159–168. https://doi.org/10.1016/j.crte.2014.03.008.