ENGELKE, Bernhard. Regelungsmöglichkeiten in der mechanischen Unkrautbekämpfung. agricultural engineering.eu, [S. l.], v. 57, n. 1, p. 16–17, 2002. DOI: 10.15150/lt.2002.1550. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2002-57-1-016-017. Acesso em: 3 mai. 2024.