
https://www.dbresearch.de/PROD/RPS_DE-PROD/PROD0000000000523908/Deutschland%3A_Konjunktur_kurzgefasst.PDF

https://fsd.ch/wp-content/uploads/2025/06/EN-FSD-Annual-REPORT-2024.pdf

https://www.bancaditalia.it/media/approfondimenti/2019/pop-bari/approfondimenti-popBari.pdf