REFERENCES
- Assyov B. and Petrova A. (eds,) (2006) Conspectus of the Bulgarian Vascular Flora. Sofia, pp. 231–234.
- Delipavlov D. and Češmedžiev I. (eds,) (2003) Key to the Plants in Bulgaria. Agrarian Univ. Acad. Press, Plovdiv.
- Jordanov D. (1931) Godishnik na Sofiyskiya Universitet, Sofia, FMF, 27(3), 75–156.
- Jordanov D. (ed.) (1963) Flora NR Bulgaria. BAN, Sofia, 1.
- Jordanov D. (ed.) (1970) Flora NR Bulgaria. BAN, Sofia, 4.
- Jordanov D. (ed.) (1979) Flora NR Bulgaria. BAN, Sofia, 7.
- Kozuharov S. (ed.) (1992) Guidebook to the higher Plants in Bulgaria. Nauka i Izkustvo, Sofia.
- Petrova A. and Vladimirov V. (eds,) (2009) Red List of Bulgarian vascular plants.—Phytologia Balcanica, 15(1), 63–94.