Selvi & Bigazzi (Griseb.) 2003 - Selvi F, Bigazzi M (2003) Revision of genus Anchusa (Boraginaceae-Boragineae) in Greece. Botanical Journal of the Linnean Society 142(4): 431-454. doi: 10.1046/j.1095-8339.2003.00206.x.
There is no corrections for Anchusa officinalis subsp. intacta yet.