https://www.socialeurope.eu/the-circular-economy-a-geometry-lesson
https://digitalcommons.law.scu.edu/cgi/viewcontent.cgi?article=1685&context=chtlj
https://www.bancaditalia.it/pubblicazioni/qef/2018-0422/QEF_422_18.pdf
https://www.prospectmagazine.co.uk/wp-content/uploads/2017/12/Tooze_feature_app_1.pdf