DBLP Record 'journals/cacm/AhnBL04'

BibTeX

@article{DBLP:journals/cacm/AhnBL04,
  author    = {Luis von Ahn and
               Manuel Blum and
               John Langford},
  title     = {Telling humans and computers apart automatically},
  journal   = {Commun. ACM},
  volume    = {47},
  number    = {2},
  year      = {2004},
  pages     = {56-60},
  ee        = {http://doi.acm.org/10.1145/966389.966390},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}