https://visegradinsight.eu/western-balkans-serbia-kosovo-deal-vejvoda/
https://www.socialeurope.eu/2017/07/g20s-future-conflict-irrelevance-course-correction/
https://ukandeu.ac.uk/study-of-federalism-uk-eu-relationship/?mc_cid=ef569320c7&mc_eid=815b1928ec