Baranova, O., S. Sibikeev, A. Druzhin, and I. Sozina. “Loss of Effectiveness of Stem Rust Resistance Genes Sr25 and Sr6Agi in the Lower Volga Region”. Plant Protection News, Vol. 104, no. 2, July 2021, pp. 105-12, DOI:10.31993/2308-6459-2021-104-2-14994.