Source: https://www.researchgate.net/publication/326229118_La_langue_maternelle_une_strategie_pour_enseignerapprendre_la_langue_etrangere/fulltext/5b3f68e7aca27207851d9c6f/La-langue-maternelle-une-strategie-pour-enseigner-apprendre-la-langue-etrangere.pdf