F. K. Kamei, S. Soares, and G. Pinto.
" The Use of Grey Literature Review as Evidence for Software Engineering", in <em>Anais Estendidos do X Congresso Brasileiro de Software: Teoria e Prática</em>, Salvador, 2019, pp. 56-63, doi: <a href="https://doi.org/10.5753/cbsoft_estendido.2019.7656">https://doi.org/10.5753/cbsoft_estendido.2019.7656</a>.