BILLER, Rainer H.; BRUNOTTE, Joachim. Pflege stillgelegter Flächen. agricultural engineering.eu, [S. l.], v. 52, n. 4, p. 184–185, 1997. DOI: 10.15150/lt.1997.2608. Disponível em: http://195.37.233.11/landtechnik/article/view/1997-52-4-184-185. Acesso em: 4 mai. 2024.