https://www.iareporter.com/articles/bulgarian-insurers-make-good-on-earlier-threat-to-lodge-claim-against-romania-invoking-terminated-intra-eu-bit/ (requires subscription)
https://www.iareporter.com/articles/icsid-registers-arbitration-brought-under-terminated-intra-eu-bit/ (requires subscription)
https://globalarbitrationreview.com/article/bulgarian-insurer-relies-sunset-clause-intra-eu-claim (requires subscription)