1. Anderson, S., Kušík, T. and Radford, E. (2005) Important Plant Areas in Central and Eastern Europe—Priority Sites for Plant Conservation. In: Anderson, S., Kušík, T., Radford, E., Eds., Plantlife International, Planta Europa, Wiltshire, p. 101.
2. Tojibaev, K.Sh., Beshko, N.Yu. and Popov, V.A. (2016) Botanical-Geographical Regionalization of Uzbekistan. Botanicheskii Zhurnal, 101, 1105-1132.
3. Kadyrov, U.H. (2020) Flora of Urgut Botanical-Geographical Region. Ph.D. Thesis, Uzbekistan National University, Tashkent, p. 40.
4. Seregin, A.P. (2014) Flora of the Vladimir Region: Analysis of Grid Mapping Data. KMK, Moscow, p. 492.
5. Tolmachev, А.I. (1974) Introduction in Plants Geography. Nauka, Leningrad, 244. https://www.scirp.org/reference/referencespapers?referenceid=1841638