DUBINA, D.V., P.M. USTIMENKO, L.P. VAKARENKO, P.M. BOIKO, and M.F. BOIKO. 2011. “The Regional Econet in a Context of Protection and Regeneration of Vegetation of a Steppe Zone of Ukraine”. CHORNOMORSKI BOTANICAL JOURNAL 6 (3): 325-37. https://www.cbj.kspu.edu/index.php/cbj/article/view/548.