1. III Tribe Cardueae Cass. (1819);Susanna,2007
2. Cardueae (Carduoideae);Susanna,2009
3. Centaurea L.;Wagenitz,1975
4. Problems and Conflicts in the Identification of Centaurea Species;Vonica;Brukenthal Acta Musei,2011
5. Morphologische Und Molekular Systematische Untersuchungen An-Der Centaurea stoebe L. Gruppe (Asteraceae-Cardueae)-in Europa;Ochsmann;Diss. Bot.,2000