Valdés Cifuentes, I. and Wagner, M. and Naderi, R.. Heirat und Familiengründung bei Deutschen und türkischstämmigen Personen in Deutschland. KZfSS Kölner Zeitschrift für Soziologie und Sozialpsychologie, Springer Fachmedien Wiesbaden, volume 65, issue 3, pages 479-504, 2013. Buber, Isabella and Panova, Ralina and Dorbritz, Jurgen. Fertility intentions of highly educated men and women and the rush hour of life. Vienne Institute of Demography/Austrian Academy of Science, issue 8, 2012. Perelli-Harris, B. and Kreyenfeld, M. and Sigle-Rushton, W. and Lappegard, T. and Jasilioniene, A. and Di Giulio, P. and Keizer, R. and Berghammer, C. and Köppen, K.. The increase in fertility in cohabitation across Europe: examining the intersection between union status and childbearing. MPIDR Working paper, volume 021, pages 42, August 2009.