FREIRE, A. H.; REIS, R. P.; VEIGA, R. D.; FONTES, R. E. ECONOMIC EFFICIENCY OF COFFEE IN THE SOUTH OF MINAS GERAIS: ONE APPLICATION OF PRODUCTION FRONTIER. Coffee Science - ISSN 1984-3909, [S. l.], v. 6, n. 2, p. 172–183, 2011. Disponível em: http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/310. Acesso em: 19 aug. 2022.