https://www.socialeurope.eu/corporate-taxation-financing-state-and-welfare
http://www.msz.gov.pl/en/news/deputy_minister_renata_szczech_takes_part_in_a_debate_on_europe_s_future
https://onlinelibrary.wiley.com/doi/10.1111/ecaf.12565
https://www.bloomberg.com/news/articles/2019-06-14/the-eu-had-to-plan-for-worst-when-greece-almost-ran-out-of-money?cmpid=BBBXT061719_BIZ&utm_medium=email&utm_source=newsletter&utm_term=190617&utm_campaign=brexit