SOMMER, Ulrich. Der Markt für Zucker. German Journal of Agricultural Economics, [S. l.], v. 54, n. 1, 2005. DOI: 10.52825/gjae.v54i1.1613. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1613. Acesso em: 23 nov. 2024.