ČÁBELKOVÁ, I., HANOUSEK, Jan. The power of negative thinking: corruption, perception and willingness to bribe in Ukraine. Applied Economics. 2004, 36(4), 383-397. ISSN 0003-6846. E-ISSN 1466-4283. Available: http://search.ebscohost.com/login.aspx?direct=true&db=bth&AN=12453997&site=ehost-live