S. de C. Barbosa, M. B. de A. Matteucci, W. M. Leandro, A. F. Leite, É. L. S. Cavalcante, and G. Q. E. de Almeida, “CONSUMER PROFILE AND PRICE VARIATION OF AGRO-ECOLOGICAL PRODUCTS”, Pesq. Agropec. Trop., vol. 41, no. 4, pp. 602–609, Dec. 2011, doi: 10.5216/pat.v41i4.11854.