R. Linden. Central and East European Politics: Changes and Challenges, Rowman & Littlefield Publishers, Lanham, Maryland, Vereinigte Staaten, 5. edition, (Eurobarometer).(2021)
L. Alipranti-Maratou. Families and Family Values in Society and Culture, Information Age Publishing, Charlotte, North Carolina, Vereinigte Staaten, (SILC).(2021)
C. Coppée, and W. Lahaye. Families and Family Values in Society and Culture, Information Age Publishing, Charlotte, North Carolina, Vereinigte Staaten, (SILC).(2021)
K. Cardiff. The Political Economy of Adjustment Throughout and Beyond the Eurozone Crisis: What Have We Learned?, Routledge, London, (Eurobarometer).(2020)