For Centaurea
Boršić, I., A. Susanna, S. Bancheva, and N. Garcia-Jacas. 2011. Centaurea sect. Cyanus: nuclear phylogeny, biogeography, and life-form evolution. Int. J. Plant Sci. 172: 238-249.
Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.
Greuter, W. 2003b. The Euro+Med treatment of Cardueae (Compositae) – generic concepts and required new names. Notulae ad floram euro-mediterraneam pertinentes No. 3. Willdenowia 33: 49-61.
Greuter, W., J. McNeill, F.R. Barrie, H.-M. Burdet, V. Demoulin, T. S. Filggueiras, D.H. Nicolson, P.C. Silva, J.E. Skog, P. Trehane, N.J. Turland, and D.L. Hawksworth. 2000. International Code of Botanical Nomenclature (St. Louis Code) adopted by the Sixteenth International Botanical Congress, St. Louis, Missouri, July-August 1999. Regnum Vegetabile 131. Koeltz Scientific Books, Königstein.
Keil, D.J., and J. Ochsmann. 2006. Centaurea. In Flora of North America Editorial Committee. 2006a. Flora of North America north of Mexico. Volume 19, Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford Univ. Press, New York, NY. 579 pp.
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