HERRMANN, Klaus. Meilensteine der Landtechnik. agricultural engineering.eu, [S. l.], v. 58, n. 2, p. 110–111, 2003. DOI: 10.15150/lt.2003.1414. Disponível em: http://195.37.233.21/landtechnik/article/view/2003-58-2-110-111. Acesso em: 9 apr. 2025.