GJAE. Wirtschaftszahlen. German Journal of Agricultural Economics, [S. l.], v. 60, n. 1, 2011. DOI: 10.52825/gjae.v60i1.1833. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1833. Acesso em: 22 nov. 2024.