Source: Valdés, B. & Raab-Straube, E. von (2011+): Boraginaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Euro+Medendemic: BulgarianativeA,B; Former YugoslavianativeC; GreecenativeC
Bibliography
A.Andreev, N. , Ančev, M. , Kožuharov, S. I. , Markova, M. , Peev, D. & Petrova, A. 1992: Opredelitel na visšite rastenija v Bălgarija. – Sofija: Nauka i izkustvo
B.Jordanov, D. 1989: Flora na Narodna Republika Bălgarija 9. – Sofija