3 Battista Biggio Giorgio Fumera Fabio Roli 2008 Adversarial Pattern Classification Using Multiple Classifiers and Randomisation 12th Joint IAPR International Workshop on Structural and Syntactic Pattern Recognition (SSPR 2008) Orlando, Florida, USA Springer-Verlag Lecture Notes in Computer Science 04/12/2008 adversarial classification multiple classifier systems spam filtering mcs00 doc02 doc00