A.Davis, P. H. 1978: Flora of Turkey and East Aegean Islands 6
B.Takhtajan, A. L. 1987: Flora of Armenia 8. – Erevan: Izdatel'stvo AN ASSR
C.Jordanov, D. 1995: Flora Reipublicae Bulgaricae 10. – Editio Academica "Professor Marin Drinov"
D.Lid, D. T. 1994: Norsk Flora, ed. 6. – Oslo
E.Güner, A. 2012: Türkiye Bitkileri Listesi. – Istanbul
F.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