https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/2020-05-13_etat_des_lieux_du_financement_de_la_protection_sociale.pdf
https://www.brookings.edu/wp-content/uploads/2018/04/es_20180416_digitalcurrencies.pdf
http://www.imf.org/en/News/Articles/2017/05/15/mcs05152017-Germany-Staff-Concluding-Statement-of-the-2017-Article-IV-Mission