RÖMER, Hans Peter; BERTRAM, Andreas; MEYER, Joachim. Der Portalversuchsrahmen (PVR). agricultural engineering.eu, [S. l.], v. 54, n. 4, p. 232–233, 1999. DOI: 10.15150/lt.1999.2218. Disponível em: http://195.37.233.11/landtechnik/article/view/1999-54-4-232-233. Acesso em: 27 apr. 2024.