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"A Proposal to Prevent Click-Fraud Using Clickable CAPTCHAs."
Rodrigo Alves Costa, Ruy J. G. B. de Queiroz, Elmano Ramalho Cavalcanti (2012)
- Rodrigo Alves Costa, Ruy J. G. B. de Queiroz, Elmano Ramalho Cavalcanti:
A Proposal to Prevent Click-Fraud Using Clickable CAPTCHAs. SERE (Companion) 2012: 62-67
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