J. A. V. Medeiros, C. A. da Cunha, and A. E. Wande, “Optimal hedge ratio for soybeans in Goiás and Mato Grosso”, Rev. Polit. Agric., vol. 22, no. 1, pp. 128–136, May 2013, Accessed: Sep. 20, 2026. Available: https://rpa.sede.embrapa.br/RPA/article/view/287