Understanding How Spammers Steal Your E-Mail Address: An Analysis of the First Six Months of Data from Project Honey Pot. - Matthew B. Prince; Benjamin M. Dahl; Lee Holloway; Arthur M. Keller; Eric Langheinrich (CEAS, 2005)

http: BL: Taking DNSBL Beyond SMTP. - Eric Langheinrich (login Usenix Mag., 2008)