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Hoepers, Cristine, Henrique Faulhaber Barbosa, Klaus Steding-Jessen, juo CGI.br. Fighting Internet Spam in Brazil - Historical Overview and Reflections on Combating Spam and Managing Port 25, Coordinated by the Brazilian Internet Steering Committee. Comitê Gestor da Internet no Brasil, 2017.

Hoepers, Cristine, et al. Fighting Internet Spam in Brazil - Historical Overview and Reflections on Combating Spam and Managing Port 25, Coordinated by the Brazilian Internet Steering Committee. Comitê Gestor da Internet no Brasil, 2017.