HOLPP, Martin. Automatisches Lenksystem für Traktoren im Obstbau. agricultural engineering.eu, [S. l.], v. 63, n. 3, p. 148–149, 2008. DOI: 10.15150/lt.2008.798. Disponível em: http://195.37.233.11/landtechnik/article/view/2008-63-3-148-149. Acesso em: 3 mai. 2024.