Coppi, A., L.  Cecchi, D.  Nocentini, and F.  Selvi. 2015. ?Arnebia purpurea: A new member of formerly monotypic genus Huynhia (Boraginaceae-Lithospermeae)?. Phytotaxa 204:123?136. Retrieved  (http://biotaxa.org/Phytotaxa/article/view/phytotaxa.204.2.3).