1. Dreyfuss, H.: The Measure of Man: Human Factors in Design. 2nd Edition. New York: Whitney Library of Design 1967.
2. Matthews, J., and J. D. C. Talamo: A study of tractor noise control. Conference on agricultural and allied tractors. London, Oct. 6–7, 1970. Paper No. 16.
3. Rohmert, W.: Physische Beanspruchung. (Physical stress). In: Schmidtke, H. (Editor): Lehrbuch der Ergonomie, 3. Ed. Munich: Verlag C. Hanser 1993.
4. Göhlich, H.:. Mensch und Maschine. (Operator-machinery relations). Lehrbuch der Agrartechnik, Vol 5. Hamburg/Berlin: Verlag P. Parey 1987.
5. Purcell, W. F. H.: The human factor in farm and industrial equipment design. ASAE Lecture Series No. 6. St. Joseph, MI: ASAE 1980 (with 27 further refs).