A. B. de O. e Silva, R. F. Matheus, F. S. Parreiras, and T. A. S. Parreiras, “Study of co-authorship in the nets and the interdisciplinarity in the scientific production on the basis of social network analysis methods: evaluation of the posgraduation program in information science - PPGCI / UFMG”, Encontros Bibli, vol. 11, no. 1, pp. 179–194, Jul. 2006.