M. M. A. G. Herreros, F. G. N. Barros, and E. dos S. Bentes, “Speculative activity of investment funds in the future market of agricultural commodities, 2006–2009”, Rev. Polit. Agric., vol. 19, no. 1, pp. 24–39, Jun. 2015, Accessed: Sep. 20, 2026. Available: https://rpa.sede.embrapa.br/RPA/article/view/326