GJAE. Wirtschaftszahlen. German Journal of Agricultural Economics, [S. l.], v. 61, n. 4, 2012. DOI: 10.52825/gjae.v61i4.1893. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1893. Acesso em: 22 nov. 2024.