Compositae Working Group (CWG) (2024). Global Compositae Database.
Hieracium spinulosum (Lapeyr.) Steud.. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1123697 on 2024-12-08
Marine Species Traits editorial board (2024). Marine Species Traits.
Hieracium spinulosum (Lapeyr.) Steud.. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1123697 on 2024-12-08