Source: https://www.researchgate.net/publication/321425744_La_mise_en_oeuvre_de_schemas_d'usage_au_service_de_la_construction_de_l'enonce_en_allemand_L2/fulltext/5a2285bca6fdcc8e866568ee/321425744_La_mise_en_oeuvre_de_schemas_d'usage_au_service_de_la_construction_de_l'enonce_en_allemand_L2.pdf