I. Ferreira, A. de Resende, and H. Costa.
"Analysis of the Impact of the Application of Design Patterns on the Maintainability of an Object Oriented System", in <em>Anais do XI Simpósio Brasileiro de Qualidade de Software</em>, Fortaleza, 2012, pp. 341-348, doi: <a href="https://doi.org/10.5753/sbqs.2012.15327">https://doi.org/10.5753/sbqs.2012.15327</a>.