Compositae Working Group (CWG) (2021). Global Compositae Database. Heterolophus sumensis (Kalen.) Soják. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1191797 on 2025-03-26
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Cas. Nar. Mus., Odd. Prir. 140, 3-4 : 133 (1972) [Vascular Plants of Russia] Soják in Cas. Nár. Muz., Odd. Prír. 140. 1972. [Euro+Med] [details] LSID urn:lsid:compositae.org:names:860E8C61-77ED-4FE4-8609-8B06451B5CD9 [details]