M. Pita and G. Torres.
"Inferring Companies Similarities from Brazilian Government Expenditure Data", in <em>Anais do XI Simpósio Brasileiro de Sistemas de Informação</em>, Goiânia, 2015, pp. 703-708, doi: <a href="https://doi.org/10.5753/sbsi.2015.5878">https://doi.org/10.5753/sbsi.2015.5878</a>.