[2022-02-13]. (原始内容存档于2022-02-25). Transparency International Global Corruption Barometer: Ukraine has become more corrupt over the last two years (页面存档备份,存于互联网档案馆)
in the Ukraine 1917–1921. 由Sharkey, Paul翻译. 奧克蘭: AK Press. 2004 [1982]. ISBN 978-1-902593-68-5. OCLC 60602979 (英语). Subtelny, Orest. Ukraine: A History