Markus Jakobsson, John Linn, Joy Algesheimer. How to Protect Against a Militant Spammer. IACR Cryptology ePrint Archive, 2003:71, 2003. [doi]
@article{JakobssonLA03, title = {How to Protect Against a Militant Spammer}, author = {Markus Jakobsson and John Linn and Joy Algesheimer}, year = {2003}, url = {http://eprint.iacr.org/2003/071}, researchr = {https://researchr.org/publication/JakobssonLA03}, cites = {0}, citedby = {0}, journal = {IACR Cryptology ePrint Archive}, volume = {2003}, pages = {71}, }