Compositae Working Group (CWG) (2021). Global Compositae Database. Sonchus zollikoferioides Rouy. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1169496 on 2025-04-03
LSID urn:lsid:compositae.org:names:1B524B29-F711-4B23-AEFA-15E297FD5488 [details] Type material [Spain] "Murcia, entre Totuna et Puerto, garigues near Lorca", 7 Jun 1882, Rouy (LY!) [details]