Павельчук, Ю. Ф., Б. М. Гевко, and А. В. Рудь. “OPTIMIZATION OF CONSTRUCTIVE PARAMETERS OF SOLID PLANTING COULTER”. Podilian Bulletin: Agriculture, Engineering, Economics, no. 27, Dec. 2017, pp. 193-01, http://pb.pdatu.edu.ua/article/view/135129.