Abdullaeva, M. N., Kovalevskaja, S. S., Kamelin R.V. 1981: Astragalus L. in Conspectus Florae Asiae Mediae. Vol. 6: 116-118. –Tashkent.
Makhmedov A. M. 1993: Centaurea L. In: Conspectus Florae Asiae Mediae. Vol. 10: 404-411. –Tashkent.
Gontscharow, N. F. 1955: Astragalus L. / Flora of Uzbekistan. Vol. 3: 473-671. –Tashkent.
Saribaev, B. 1994: Flora and vegetation of a plateau Ustyurt and prospects of their use. Avtoreferat of dissertation, 32 pp. –Tashkent.
Takhtajan, A. L. 1986: Floristic regions of the world. –Berkeley-Los Angeles-London.
Czerepanov, S. K. 1995: Vascular plants of Russia and Adjacent states (the former USSR). –Cambridge.
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