Source: https://www.researchgate.net/profile/Bendaoudi-Seif-Eddine/publication/334031138_Conception_Assistee_par_Ordinateur_Cours_Exercices_d'application/links/5d13404da6fdcc2462a686a5/Conception-Assistee-par-Ordinateur-Cours-Exercices-dapplication.pdf