Compositae Working Group (CWG) (2024). Global Compositae Database.
Centaurea phrygia f. subcapitata Gajic. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1164913 on 2025-04-03
Marine Species Traits editorial board (2025). Marine Species Traits.
Centaurea phrygia f. subcapitata Gajić. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1164913 on 2025-04-03