Source: http://www.cafepedagogique.net/communautes/MarcCourbot/Documents/-%20Premi%C3%A8re%20S%20-/Chapitres%2012%20et%2013%20-%20PRODUIT%20SCALAIRE%20-%20APPLICATIONS%20DU%20PRODUIT%20SCALAIRE/1S%20-%20Chapitres%2012%20et%2013%20-%20CT.pdf