https://www.economiesuisse.ch/de/artikel/die-praemien-sind-zu-35-prozent-einkommensabhaengig
https://www.hende-i-medio-ambiente.org/wp-content/uploads/2021/02/wpiea2020286-print-pdf.pdf
https://ukandeu.ac.uk/regardless-of-our-views-on-brexit-we-can-all-get-behind-the-idea-of-supporting-the-uks-innovators/?mc_cid=50b7d10115&mc_eid=815b1928ec