@online{la_collection_charles_7826,
  title = {La collection Charles-Cros sur Gallica},
  author = {Billi\`eres, Michel},
  year = {2015},
  date = {30/11/2015},
  journal = {Au son du fle},
  url = {http://www.verbotonale-phonetique.com/la-collection-charles-cros-sur-gallica/},
}