https://www.imf.org/-/media/Files/Publications/DP/2022/English/POSRFEA.ashx
http://www.case-research.eu/files/?id_plik=5223
https://www.bankofengland.co.uk/-/media/boe/files/speech/2020/covid-19-and-the-economy-speech-silvana-tenreyro.pdf?la=en&hash=94DE5B4F39A84E537341F3
http://www.ebrd.com/news/events/ebrd-transition-report-201718.html