@inproceedings{IACR:conf/fse/Muller04,
  author    = {Fr{\'e}d{\'e}ric Muller},
  title     = {Differential Attacks against the Helix Stream Cipher},
  booktitle = {FSE},
  year      = {2004},
  pages     = {94-108},
  ee        = {http://www.iacr.org/archive/asiacrypt2007/30170094/30170094.pdf},
  crossref  = {IACR:conf/fse/2004},
  bibsource = {IACR, http://www.iacr.org}
}

@proceedings{<a href="http://www.iacr.org/archive/">IACR</a>:fse2004/fse2004.html,
  editor    = {Bimal K. Roy and
               Willi Meier},
  title     = {Fast Software Encryption, 11th International Workshop, FSE 2004,
               Delhi, India, February 5-7, 2004, Revised Papers},
  booktitle = {FSE},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {3017},
  year      = {2004},
  isbn      = {3-540-22171-9},
  bibsource = {IACR, http://www.iacr.org}
}