ALT, Norbert. Technische Regelwerke in der Europäischen Union. agricultural-engineering.eu, [S. l.], v. 52, n. 1, p. 6–7, 1997. DOI: 10.15150/lt.1997.2570. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1997-52-1-006-007. Acesso em: 28 märz. 2024.