https://www.nnfe.eu/what-more-can-be-done-tackle-migration-crisis
https://ukandeu.ac.uk/what-have-we-learned-about-migration-from-the-census/?mc_cid=50b7d10115&mc_eid=815b1928ec
https://carnegieendowment.org/politika/88202
https://www.dw.com/en/swedens-population-shrinks-for-first-time-in-50-years/a-69893811