source:Source: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/162A5074E5F022B10E58DAB447B16BC5/S0008413100019307a.pdf/lemploi-des-temps-verbaux-en-francais-moderne-essai-de-grammaire-descriptive-par-paul-imbs-paris-klincksieck-1960-270-pages.pdf
