http://www.cadtm.org/IMG/pdf/Alexander_Sack_DETTE_ODIEUSE.pdf
https://www.socialeurope.eu/wp-content/uploads/2017/06/EURO-web.pdf
https://scholar.harvard.edu/files/rogoff/files/nber26760_why_is_euro_punching_below_its_weight.pdf
http://english.bdi.eu/#/article/news/robust-economy-no-cause-for-complacency/