Ribeiro, R., M. Garcia, and A. Las Casas. “ Strategy and Competitive Advantages in Brazilian Telecommunications: A Multiple Case Study from 1999 to 2007 ”. REGE Revista De Gestão, Vol. 17, no. 3, Sept. 2010, pp. 297-12, doi:10.5700/issn.2177-8736.rege.2010.36709.