@inproceedings{IACR:conf/crypto2003/DworkC03,
  author    = { Cynthia Dwork and Andrew Goldberg and Moni Naor
               },
  title     = {On Memory-Bound Functions for Fighting Spam},
  booktitle = {CRYPTO)},
  year      = {2003},
  pages     = {426-444},
  ee        = {http://www.iacr.org/archive/crypto2003/27290425/27290425.pdf},
  crossref  = {IACR:conf/crypto2003},
  bibsource = {IACR, http://www.iacr.org}
}

@proceedings{IACR:conf/crypto2003,
  editor    = {Dan Boneh},
  title     = {Advances in Cryptology - CRYPTO 2003, 23rd Annual International
Cryptology Conference, Santa Barbara, California, USA, August 17-21,
2003, Proceedings},
  booktitle = {CRYPTO},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {2729},
  year      = {2003},
  isbn      = {3-540-40674-3},
  bibsource = {IACR, http://www.iacr.org}
}