SOMMER, Ulrich. Der Markt für Zucker. German Journal of Agricultural Economics, [S. l.], v. 52, n. 1, 2003. DOI: 10.52825/gjae.v52i1.1537. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1537. Acesso em: 23 nov. 2024.