C. Karlberger, G. Bayler, Ch. Krügel, E. Kirda:
"Exploiting Redundancy in Natural Language to Penetrate Bayesian Spam Filters";
Talk: Usenix Workshop on Offensive Technologies (WOOT), Boston, USA; 2007-08-06; in: "Usenix Workshop on Offensive Technologies (WOOT)", (2007), 1 - 7.
http://publik.tuwien.ac.at/files/pub-inf_5318.pdf