Korupcionni indeksi na Koalicija 2000, Noemvri 2001 (Centăr za izsledvane na demokracijata, 2001)
In the period 04.10.2001 г. - 20.10.2001, Vitosha Research conducted its survey concerning the corruption among the population in Bulgaria. The study is part of Coalition 2000's Corruption Monitoring System