Stop the war!
Остановите войну!
for scientists:
default search action
"An anti-spam scheme using pre-challenges."
Rodrigo Roman, Jianying Zhou, Javier López (2006)
- Rodrigo Roman, Jianying Zhou, Javier López:
An anti-spam scheme using pre-challenges. Comput. Commun. 29(15): 2739-2749 (2006)
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.