M. Saraiva and C. Medeiros.
" Use of graphs and taxonomic classifications to analyze content relationships among courseware", in <em>Anais do XXXI Simpósio Brasileiro de Bancos de Dados</em>, Salvador/BA, 2016, pp. 265-270, doi: <a href="https://doi.org/10.5753/sbbd.2016.24339">https://doi.org/10.5753/sbbd.2016.24339</a>.