Ion Androutsopoulos John Koutsias Konstantinos Chandrinos Constantine D. Spyropoulos An experimental comparison of naive bayesian and keyword-based anti-spam filtering with personal e-mail messages. 160-167 2000 SIGIR http://doi.acm.org/10.1145/345508.345569 db/conf/sigir/sigir2000.html#AndroutsopoulosKCS00