Datenquelle: GND
Chorizont 2030
demografski tendencii v BălgarijaSofija : Fondacija Fridrich Ebert Bjuro Bălgarija, 2018Horizon 2030
demographic tendencies in BulgariaSofia : Friedrich-Ebert-Stiftung Office Bulgaria, 2018Coping with demographic decline in Croatia and Bulgaria
Zagreb : Friedrich-Ebert-Stiftung, Regional Office for Croatia and Slovenia, November 2017