G. da S. e Souza, E. G. Gomes, and E. Alves, “Market imperfections and income concentration in agricultural production”, Rev. Polit. Agric., vol. 27, no. 2, p. 31, Dec. 2018, Accessed: Sep. 20, 2026. Available: https://rpa.sede.embrapa.br/RPA/article/view/1410