Coreopsis im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Abgerufen am 24. Januar 2019.
doi.org
Daniel J. Crawford, Mark E. Mort: Phylogeny of Eastern North American Coreopsis (Asteraceae-Coreopsideae): insights from nuclear and plastid sequences, and comments on character evolution. In: American Journal of Botany, Volume 92, Issue 2, 2005, S. 330–336. doi:10.3732/ajb.92.2.330
efloras.org
John L. Strother: In: Flora of North America Editorial Committee (Hrsg.): Flora of North America North of Mexico, Volume 21 - Magnoliophyta: Asteridae, part 8: Asteraceae, part 3 (Heliantheae, Eupatorieae), Oxford University Press, New York und Oxford, 2006, ISBN 0-19-530565-5. Coreopsis Linnaeus., S. - textgleich online wie gedrucktes Werk.
