Compositae Working Group (CWG) (2024). Global Compositae Database. Hieracium caucasiense subsp. biebersteinii (Zahn) Greuter. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=1152631 on 2024-08-29
Marine Species Traits editorial board (2024). Marine Species Traits. Hieracium caucasiense subsp. biebersteinii (Zahn) Greuter. Accessed at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=1152631 on 2024-08-29