Compositae Working Group (CWG) (2024). Global Compositae Database. Centaurea phrygia subsp. ratezatensis (Prodan) Dostál. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1154568 on 2025-04-03
Marine Species Traits editorial board (2025). Marine Species Traits. Centaurea phrygia subsp. ratezatensis (Prodan) Dostál. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1154568 on 2025-04-03