HERRMANN, Klaus. Meilensteine der Landtechnik. agricultural engineering.eu, [S. l.], v. 61, n. 2, p. 106–107, 2006. DOI: 10.15150/lt.2006.1072. Disponível em: http://195.37.233.21/landtechnik/article/view/2006-61-2-106-107. Acesso em: 15 apr. 2025.