Source: Raab-Straube, E. von & Henning, T. (2018+): Violaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Euro+Medendemic: CrimeanativeA,B; MoldovanativeA,C; Russia (C European RussianativeA,B, E European RussianativeA, S European RussianativeA,B); UkrainenativeB; Ukraine, with CrimeanativeA,D,E
Bibliography
A.Fedorov, A. A. 1996: Flora Europae Orientalis 9. – Petropoli: Mir i Semia-XCV
B.Tzvelev, N. N. & Geltman, D. V. (ed.) 2012: Conspectus Florae Europae Orientalis 1. – Petropoli
C.Gejdeman, T. S. 1986: Opredelitel' vysših rastenij Moldavskoj SSR, ed. 3. – Kisinev: Shtiintza
D.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
E.Prokudin, J. N. 1987: Opredelitel’ vysših rastenij Ukrainy. – Kiev: Naukova Dumka