@Misc{Riv92c,
  author = 	 { Ronald L. Rivest },
  title = 	 { The {MD5} Message Digest Algorithm },
  howpublished = { Internet RFC 1321 },
  date =         { 1992-04 },                  
  OPTmonth = 	 { April },
  OPTyear = 	 { 1992 },
}