TY - JOUR A1 - Hoem, J.M. A1 - Kostova, D. A1 - Jasilioniene, A. A1 - Mureşan, C. T1 - Traces of the Second Demographic Transition in Four Selected Countries in Central and Eastern Europe: Union Formation as a Demographic Manifestation Y1 - 2009 DO - 10.1007/s10680-009-9177-y JF - European Journal of Population / Revue européenne de Démographie VL - 25 IS - 3 SP - 239 EP - -255 ER -