1. Stoss, K.J.: Tractor Power for Implement Operation − Mechanical, Hydraulic, and Electrical: An Overview. ASAE Lecture Series No. 37. St. Joseph, MI: ASAE 2013.
2. Fröba, N., M. Neukam, and A. Schauer: Anhängevorrichtungen an Traktoren. (Tractor coupling devices for pulling). DLG Merkblatt 387. Frankfurt/M.: Deutsche Landwirtschaftsgesellschaft 2013.
3. Mayhew, R.D.: Agricultural Tractor/Implement Drivelines. ASAE Lecture Series No. 19. St. Joseph, MI: ASAE 1994.
4. Seherr-Thoss, H.-Ch. v., F. Schmelz, and E. Aucktor: Universal Joints and Driveshafts. 2nd edition. Berlin, Heidelberg, New York: Springer-Verlag 2006. Also German and Chinese editions.
5. Niskanen, H.: The Proud History of AGCO. Duluth, USA, AGCO Corporation. Helsinki: Gummerus Printing, 2008.