Datenquelle: GND
Bulgarien Kurzberichte
[Berlin : Friedrich-Ebert-Stiftung], 1 (2009)-3 (2009) ; damit Erscheinen eingestellt, 2009-2009Politbarometăr (2008) April - Juni
Sofija : FES Bălgarija, Godina 18 (2018)-, 2018-Politbarometăr (2008) Juli - Septemvri
Sofija : FES Bălgarija, Godina 18 (2018)-, 2018-Politbarometăr (2008) Oktomvri - Dekemvri
Sofija : FES Bălgarija, Godina 18 (2018)-, 2018-Polit-Barometer Jg. 8 (2008)
Sofia : FES Bulgaria, Year 18 (2018)-, 2018-Polit-Barometer Jg. 8 (2008) Issue 4, January - March
Sofia : FES Bulgaria, Year 18 (2018)-, 2018-Polit-Barometer Jg. 8 (2008) Issue 2, April - June
Sofia : FES Bulgaria, Year 18 (2018)-, 2018-Polit-Barometer Jg. 8 (2008) Issue 3, July - September
Sofia : FES Bulgaria, Year 18 (2018)-, 2018-Polit-Barometer Jg. 8 (2008) Issue 4, Oktober - December
Sofia : FES Bulgaria, Year 18 (2018)-, 2018-Politbarometăr (2008)
Sofija : FES Bălgarija, Godina 18 (2018)-, 2018-Politbarometăr (2008) Januari - Mart
Sofija : FES Bălgarija, Godina 18 (2018)-, 2018-