Tkachuk, O. P, and V. I. Verhelis V. I. “PROTEIN AND NITRATE CONTENT IN MAIZE GRAINS AND SUNFLOWER SEEDS WHEN GROWN ON SLOPEFUL LAND”. Podilian Bulletin: Agriculture, Engineering, Economics, no. 36 (February 14, 2023): 21–27. Accessed April 29, 2024. http://pb.pdatu.edu.ua/article/view/273877.