Terry Costlow. Digital Postmark Helps Fight Spam, Virus Attacks. IEEE Distributed Systems Online, 5(5), 2004. [doi]
@article{Costlow04b,
title = {Digital Postmark Helps Fight Spam, Virus Attacks},
author = {Terry Costlow},
year = {2004},
doi = {10.1109/MDSO.2004.3},
url = {http://doi.ieeecomputersociety.org/10.1109/MDSO.2004.3},
researchr = {https://researchr.org/publication/Costlow04b},
cites = {0},
citedby = {0},
journal = {IEEE Distributed Systems Online},
volume = {5},
number = {5},
}