José Pinheiro Júnior and Sidi Ehmety. 2001.
 Um Linux Reduzido para Sistema de Firewall. In <em>Proceedings of the 1st Workshop on Computer Systems Security</em>, March 05, 2001, Florianópolis, Brasil. SBC, Porto Alegre, Brasil, 86-95. DOI: <a href="https://doi.org/10.5753/sbseg.2001.21290">https://doi.org/10.5753/sbseg.2001.21290</a>.