SPECKMANN, Hermann. Schnittstelle Mensch-Maschine. agricultural-engineering.eu, [S. l.], v. 54, n. 1, p. 24–25, 1999. DOI: 10.15150/lt.1999.2330. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/1999-54-1-024-025. Acesso em: 29 märz. 2024.