Rosabelle Samuel; Walter Gutermann; Tod F. Stuessy; Claudete F. Ruas; Hans-Walter Lack; Karin Tremetsberger; Salvador Talavera; Barbara Hermanowski; Friedrich Ehrendorfer (2006). “Molecular phylogenetics reveals Leontodon (Asteraceae, Lactuceae) to be diphyletic”. American Journal of Botany. 93: 1193–1205. doi:10.3732/ajb.93.8.1193. PMID21642184.
Rosabelle Samuel; Walter Gutermann; Tod F. Stuessy; Claudete F. Ruas; Hans-Walter Lack; Karin Tremetsberger; Salvador Talavera; Barbara Hermanowski; Friedrich Ehrendorfer (2006). “Molecular phylogenetics reveals Leontodon (Asteraceae, Lactuceae) to be diphyletic”. American Journal of Botany. 93: 1193–1205. doi:10.3732/ajb.93.8.1193. PMID21642184.