Leshchuk, N. V., V. V. . Levchenko, A. I. Sydorchuk, and A. I. Boiko. “Historical Origins and Stages of Formation of the Variety Testing Network of the Cherkasy Region”. Plant Varieties Studying and Protection, vol. 19, no. 2, June 2023, pp. 104-9, doi:10.21498/2518-1017.19.2.2023.282556.