http://cer.eu/in-the-press/speech-michel-barnier-future-eu-conference
http://www.europarl.europa.eu/RegData/etudes/IDAN/2017/599352/EPRS_IDA%282017%29599352_EN.pdf
http://www.consilium.europa.eu//media/32504/xt21004-ad01re02en18.pdf
https://ukandeu.ac.uk/explainers/eu-switzerland-negotiations-agreement/?mc_cid=1b270f9c56&mc_eid=815b1928ec