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"Pricing Electronic Mail to Solve the Problem of Spam."
Robert E. Kraut et al. (2005)
- Robert E. Kraut, Shyam Sunder, Rahul Telang, James Morris:
Pricing Electronic Mail to Solve the Problem of Spam. Hum. Comput. Interact. 20(1-2): 195-223 (2005)
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