Salvatore J. Stolfo Shlomo Hershkop Ke Wang Olivier Nimeskern Chia-Wei Hu Behavior Profiling of Email. 74-90 2003 conf/isi/2003 ISI http://link.springer.de/link/service/series/0558/bibs/2665/26650074.htm db/conf/isi/isi2003.html#StolfoHWNH03