Steding-Jessen, Klaus, Nandamudi L. Vijaykumar, and Antonio Montes. 2008. “Using Low-Interaction Honeypots to Study the Abuse of Open Proxies to Send Spam”. INFOCOMP Journal of Computer Science 7 (1):44-52. https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/205.