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  title = 	 {Biologie Cellulaire: l'ADN},
  journal = 	 {http://www.dnafb.org},
  year = 	 {2002},
  
}

@Article{replication,
  author = 	 {www.nature.com},
  title = 	 {structure},
  journal = 	 {http://www.nature.com/nature/dna50/articles},
  year = 	 {2003},
}

@Article{adn,
  author = 	 {www.wikipedia.com},
  title = 	 {L'ADN},
  journal = 	 {encyclopédie en ligne Wikip\'edia},
  year = 	 {2004},
}