@Comment{ref,
  namespace = "cite"
}
 
 
@Book{GangOfFour,
  author     = "Erich {Gamma} and Richard {Helm} and Ralph {Johnson} and John {Vlissides}",
  ref-author = "Gamma, et al.",
  title      = "Design Patterns: Elements of Reusable Object-Oriented Software",
  publisher  = "Addison-Wesley",
  year       = 1994,
  address    = "Reading, Mass.",
  pages      = 395,
  isbn       = "0-201-63361-2",
  url        = "http://en.wikipedia.org/wiki/Design_Patterns"
}