1. Zvir G., RizunН., Hnatush S. Influence of phosphorus compounds on the formation of ammonium ions by cells of nitrogen-fixing bacteria Аzotobacter chroococcum VKM V-1272 // The Journal of V.N.Karazin Kharkiv National University. Series «Biology». 2020. № 34 (34). C. 131-140.