TWEETEN, Luther G.; FLORA, Cornelia B. Vertical Coordination of Agriculture in Farming-Dependent Areas. Council for Agricultural Science and Technology (CAST), Ames, U.S.A., 2001. DOI: 10.62300/93s7be89. Disponível em: https://publications.cast-science.org/CAST/article/view/189. Acesso em: 1 jul. 2026.