Analysis of information sources in references of the Wikipedia article "Couverture chocolate" in English language version.
La manière de confectionner cette enveloppe en chocolat est un secret de chocolatier qui n'a pas encore été publié ; on l'appelle la sauce ou la couverture. [...] Si la sauce ne coulait pas assez, quoique fondue à propos, il faudrait y ajouter du beurre de cacao, que vendent les chocolatiers et les pharmaciens.[How this chocolate coating is made is a chocolatier's secret that has not yet been published; it is called the "sauce" or the "couverture". [...] If the sauce does not flow enough, even if melted properly, it is necessary to add cocoa butter, which is sold by chocolatiers and pharmacists.]
