Template:Flora URSS 27
- Schischkin, B.K. & Bobrov, E.G. (eds.) 1962. Flora URSS (Flora Unionis Rerumpublicarum Sovieticarum Socialisticarum) XXVII. [Compositae, Tribes Echinopsideae and Cynareae] [in Russian]. Academia Scientiarum URSS, Mosqua, Leningrad. 653 pp. DJVU English translation: 741 pp. BHL
