S. . Barreto Giorgi Sant’Anna, A. C. de Oliveira Eichner, and M. Cardoso Guedes, “Benefit of cochlear implants in adult individuals with prelingual deafness: DOI: 10.15343/0104-7809.200832.2.15”, Mundo Saude, vol. 32, no. 2, pp. 238–242, Apr. 2008.