RICKFELDER, Christoph. Internationale Sicherheitsnormen. agricultural engineering.eu, [S. l.], v. 62, n. 3, p. 164–165, 2007. DOI: 10.15150/lt.2007.970. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2007-62-3-164-165. Acesso em: 2 mai. 2025.