GJAE. Wirtschaftszahlen. German Journal of Agricultural Economics, [S. l.], v. 61, n. 3, 2012. DOI: 10.52825/gjae.v61i3.1882. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1882. Acesso em: 9 apr. 2025.