G. Gereffi, The organization of buyer-driven global commodity chains: How U.S. retailers shape overseas production networks, Commodity chains and global capitalism, pp.95-122, 1994.

G. F. Thompson, Between hierarchies and markets: The logic and limits of network forms of organization, 2003.
DOI : 10.1093/acprof:oso/9780198775270.001.0001

J. M. Talbot, The comparative advantages of tropical commodity chain analysis) Frontiers of commodity chain research, pp.93-109, 2009.

J. Bair, Global commodity chains ? Genealogy and review, Frontiers of commodity chain research, pp.1-34, 2009.

I. Wallerstein, The Rise and Future Demise of the World Capitalist System: Concepts for Comparative Analysis, Comparative Studies in Society and History, vol.16, issue.04, pp.387-415, 1974.
DOI : 10.1017/S0010417500007520

J. M. Talbot, Tropical commodity chains, forward integration strategies and international inequality: coffee, cocoa and tea, Review of International Political Economy, vol.32, issue.4, pp.701-734, 2002.
DOI : 10.1111/1467-7660.00072

E. M. Ferragi and I. A. Nääs, Ethanol, corn and broiler: The interdependence between the global chains, Brazilian Journal of Biosystems Engineering, vol.9, issue.1, pp.1-10, 2015.

S. P. Borgatti, A. Mehra, D. J. Brass, and G. Labianca, Network Analysis in the Social Sciences, Science, vol.323, issue.5916, pp.892-895, 2009.
DOI : 10.1126/science.1165821

L. C. Freeman, Centrality in social networks conceptual clarification, Social Networks, vol.1, issue.3, pp.215-239, 1978.
DOI : 10.1016/0378-8733(78)90021-7
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.227.9549

S. Wasserman and K. Faust, Social Network Analysis: Methods and Applications, 1994.
DOI : 10.1017/CBO9780511815478

Y. Kim, T. Y. Choi, T. Yan, and K. Dooley, Structural investigation of supply networks: A social network analysis approach, Journal of Operations Management, vol.29, issue.3, pp.194-211, 2011.
DOI : 10.1016/j.jom.2010.11.001

D. Mitchell, A note on rising food prices World Bank Policy Research Working Paper 4682. The World Bank Development Prospects Group, 2008.

A. Ajanovic, Biofuels versus food production: Does biofuels production increase food prices?, Energy, vol.36, issue.4, pp.2070-2076, 2011.
DOI : 10.1016/j.energy.2010.05.019

D. B. Lobell, W. Schlenker, and J. Costa-roberts, Climate Trends and Global Crop Production Since 1980, Science, vol.333, issue.6042, pp.616-620, 1980.
DOI : 10.1126/science.1204531

S. M. Nusser and J. J. Goebel, The National Resources Inventory: a long-term multi-resource monitoring programme, Environmental and Ecological Statistics, vol.4, issue.3, pp.181-204, 1997.
DOI : 10.1023/A:1018574412308

R. Radhakrishna, Agricultural Growth, Employment, and Poverty: A Policy Perspective, Economic and Political Weekly, vol.37, issue.3, pp.243-245, 2002.

A. O. Krueger, M. Schiff, and A. Valdés, Agricultural Incentives in Developing Countries: Measuring the Effect of Sectoral and Economywide Policies, The World Bank Economic Review, vol.2, issue.3, pp.255-271, 1988.
DOI : 10.1093/wber/2.3.255

A. Demirbas, Political, economic and environmental impacts of biofuels: A review Applied Energy, pp.108-117, 2009.

U. Epa and ?. U. , Environmental Protection Agency. National Agriculture Center

R. A. Hanneman and M. Riddle, Introduction to social network methods, 2005.

S. P. Borgatti, NetDraw Software for Network Visualization Analytic Technologies, 2002.

D. Studder, Data visualization and discovery for better business decisions. TDWI best practices report, TDWI research, 2013.

T. Opsahl, F. Agneessens, and J. Skvoretz, Node centrality in weighted networks: Generalizing degree and shortest paths, Social Networks, vol.32, issue.3, pp.245-251, 2010.
DOI : 10.1016/j.socnet.2010.03.006

E. Farina, L. Rodrigues, and E. L. Souza, A política de petróleo e a indústria de etanol no Brasil, Interesse Nacional. Julho/Setembro, pp.64-75, 2013.

C. Valdes, I. V. Lopes, and M. R. Lopes, Changing food demand challenges Brazil's farm sector. Brazilian Agriculture, pp.27-33, 2009.

S. R. Figueira and H. L. Burnquist, Programas para álcool combustível nos Estados Unidos e possibilidades de Exportação do Brasil, Agric. São Paulo, vol.53, pp.5-18, 2006.

G. Sorda, M. Banse, and C. Kemfert, An overview of biofuel policies across the world, Energy Policy, vol.38, issue.11, pp.6977-6988, 2010.
DOI : 10.1016/j.enpol.2010.06.066

A. Banerjee, Food, Feed, Fuel: Transforming the competition for grains. Development and Change, pp.529-557, 2011.