
https://www.20minutes.fr/politique/2424043-20190115-non-traite-aix-chapelle-va-donner-alsace-lorraine-allemagne

http://www.egmontinstitute.be/content/uploads/2019/03/SPB108.pdf?type=pdf

http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-%2F%2FEP%2F%2FNONSGML%2BCOMPARL%2BPE-602.995%2B01%2BDOC%2BPDF%2BV0%2F%2FEN