U. Souza, F. Protti, M. da Silva, and D. Rautenbach.
"Multivariate Investigation of NP-Hard Problems: Boundaries Between Parameterized Tractability and Intractability", in <em>Anais do XXVIII Concurso de Teses e Dissertações</em>, Recife, 2015, pp. 19-24, doi: <a href="https://doi.org/10.5753/ctd.2015.9996">https://doi.org/10.5753/ctd.2015.9996</a>.