Savchenko, G., V. Ronkin, V. Kletenkin, and A. Vysochina. “The Results of Phenological Observations in Plants of Steppe and Meadow Habitats of RLP "The Velykyi Burluk-Steppe" And NNP ‘Dvorichanskyi’”. The Journal of V.N.Karazin Kharkiv National University. Series «Biology», Vol. 28, 1, pp. 187-95, doi:10.26565/2075-5457-2017-28-24.