https://www.brookings.edu/wp-content/uploads/2021/04/FP_20210405_china_cyber_power.pdf
https://www.bancaditalia.it/media/approfondimenti/2019/pop-bari/approfondimenti-popBari.pdf
https://www.robert-schuman.eu/en/doc/entretiens-d-europe/ee-100-en.pdf
https://www.dhl.com/content/dam/dhl/global/dhl-spotlight/documents/pdf/2021-gci-update-report.pdf