Melo, Ewerton Bruno de, et al. “ECONOMIC AND FINANCIAL EVALUATION OF COMPANIES MEMBERS OF IGC-BM & F BOVESPA IN THE PERSPECTIVE OF DATA ENVELOPMENT ANALYSIS”. REVISTA AMBIENTE CONTÁBIL - Universidade Federal Do Rio Grande Do Norte, vol. 6, no. 2, July 2014, pp. 189-1, https://periodicos.ufrn.br/ambiente/article/view/4961.