https://www.atlantico.fr/decryptage/3593256/la-dette-europeenne-s-arrache-comme-des-petits-pains-mais-il-y-a-une-tres-mauvaise-nouvelle-derriere-la-bonne-euro-bce-mathieu-mucherie-?utm_source=wm&utm_medium=email&utm_campaign=20201023
https://www.ecb.europa.eu/pub/pdf/ecbu/eb201703.en.pdf?ea7747ab0ef3b038300a8d51a3a95313
https://www.riksbank.se/en-gb/press-and-published/notices-and-press-releases/debate-articles/payments-in-the-future-and-legal-protection-for-the-swedish-krona/