GJAE. Wirtschaftszahlen. German Journal of Agricultural Economics, [S. l.], v. 63, n. 4, 2014. DOI: 10.52825/gjae.v63i4.1970. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1970. Acesso em: 22 nov. 2024.