Land plant extinction at the end of the Cretaceous: a quantitative analysis of the North Dakota megafloral recordDOI: info:10.1666/0094-8373(2004)030<0347:LPEATE>2.0.CO;2v. 30No. 3347–368
Wilf, Peter and Johnson, Kirk R. 2004. "Land plant extinction at the end of the Cretaceous: a quantitative analysis of the North Dakota megafloral record." Paleobiology, 30, (3) 347–368. https://doi.org/10.1666/0094-8373(2004)030<0347:LPEATE>2.0.CO;2.