Paleogene plants fractionated carbon isotopes similar to modern plantsDOI: info:10.1016/j.epsl.2015.07.029v. 42933–44
Diefendorf, Aaron F., Freeman, Katherine H., Wing, Scott L., Currano, Ellen D., and Mueller, Kevin E. 2015. "Paleogene plants fractionated carbon isotopes similar to modern plants." Earth and Planetary Science Letters, 429 33–44. https://doi.org/10.1016/j.epsl.2015.07.029.