Palynological composition of a Lower Cretaceous South American tropical sequence: Climatic implications and diversity comparisons with other latitudesDOI: info:10.3732/ajb.1200135v. 99Botanical Society of America1819–1827
Mejia-Velasquez, Paula J., Dilcher, David L., Jaramillo, Carlos A., Fortini, Lucas B., and Manchester, Steven R. 2012. "Palynological composition of a Lower Cretaceous South American tropical sequence: Climatic implications and diversity comparisons with other latitudes." American Journal of Botany, 99 1819–1827. https://doi.org/10.3732/ajb.1200135.