Henry S. Baird, Kris Popat. Human Interactive Proofs and Document Image Analysis. In Daniel P. Lopresti, Jianying Hu, Ramanujan S. Kashi, editors, Document Analysis Systems V, 5th International Workshop, DAS 2002, Princeton, NY, USA, August 19-21, 2002, Proceedings. Volume 2423 of Lecture Notes in Computer Science, pages 507-518, Springer, 2002. [doi]
Abstract is missing.