TEBRÜGGE, Friedrich; BÖHRNSEN, Anja. Direktsaat. agricultural engineering.eu, [S. l.], v. 55, n. 1, p. 17–19, 2000. DOI: 10.15150/lt.2000.1846. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2000-55-1-017-019. Acesso em: 6 mai. 2024.