Bazaluk, Oleg (2016). "Introduction". Corruption in Ukraine: Rulers' Mentality and the Destiny of the Nation. Cambridge Scholars. pp. XIV. ISBN9781443896894.
Transparency International Global Corruption Barometer 2009 ReportArchived June 7, 2009, at the Wayback Machine, June 2, 2009, ISBN978-3-935711-28-9 pdf Abs1:22, 32, 33. In Ukraine, 1200 people were interviewed face to face in a national survey November 4–12, 2008. The survey in the UK was of 1018 people interviewed online November 27 – December 1, 2008. The survey in the U.S. was of 1017 people interviewed online October 30 – November 4, 2008. (pdf ABs1:22).
Leshchenko, S., 2013a. Yakshcho Akhmetov ne zupynyt Yanukovycha, to rozdilyt vidpovidalnist iz nym. Ukrayinska Pravda Blog. December 3. Archived September 1, 2015, at the Wayback Machine.
Transparency International Global Corruption Barometer 2009 ReportArchived June 7, 2009, at the Wayback Machine, June 2, 2009, ISBN978-3-935711-28-9 pdf Abs1:22, 32, 33. In Ukraine, 1200 people were interviewed face to face in a national survey November 4–12, 2008. The survey in the UK was of 1018 people interviewed online November 27 – December 1, 2008. The survey in the U.S. was of 1017 people interviewed online October 30 – November 4, 2008. (pdf ABs1:22).
