Euro+Med: SlovakianativeA,B; Ukraine, with CrimeanativeC
Bibliography
A.Dostál, J. 1989: Nová kvetena CSSR 2. – Praha
B.Kubát, K. 1992: Velky klúc na urcovanie vyssích rastlín II
C.Mosyakin, S. L. & Fedoronchuk, M. M. 1999: Vascular plants of Ukraine. A nomenclatural checklist. – Kiev: M. G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine