RICKFELDER, Christoph. Technische Regelwerke in der Europäischen Union. agricultural engineering.eu, [S. l.], v. 52, n. 2, p. 100–101, 1997. DOI: 10.15150/lt.1997.2568. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1997-52-2-100-101. Acesso em: 19 apr. 2024.