http://library.fes.de/pdf-files/wiso/14397.pdf
https://www.progressivepolicy.org/blogs/ppis-trade-fact-of-the-week-world-patenting-has-quadrupled-since-the-conclusion-of-the-wtos-trips-agreement/
https://www.socialeurope.eu/the-circular-economy-a-geometry-lesson
https://www.ispionline.it/it/pubblicazione/la-crisi-tedesca-e-il-futuro-dellindustria-europea-189853