Peixoto, F.M. et al. 2011. Corporate governance and efficiency in the Electricity Sector using Data Envelopment Analysis: a study in the brazilian stock market. Revista de Ciencias de la Administración. 13, 31 (dic. 2011), 161–189. DOI:https://doi.org/10.5007/2175-8077.2011v13n31p161.