TY - JOUR A1 - Hoem, J.M. A1 - Kostova, D. A1 - Jasioniene, 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 VL - 25 IS - 3 SP - 239 EP - -255 ER -