https://documents-dds-ny.un.org/doc/UNDOC/LTD/N22/622/29/PDF/N2262229.pdf?OpenElement
https://www.crisisgroup.org/europe-central-asia/eastern-europe/ukraine/responding-new-crisis-ukraines-borders
https://blogs.lse.ac.uk/europpblog/2023/02/06/is-a-breakthrough-in-serbia-kosovo-negotiations-finally-possible/