SCHEIDTWEILER, Thomas W.; EIKEL, Gottfried. Punch planting. agricultural engineering.eu, [S. l.], v. 56, n. SH1, p. 204–206, 2001. DOI: 10.15150/lt.2001.2139. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2001-56-SH1-204-206. Acesso em: 23 apr. 2024.