TY - JOUR A1 - Billari, F.C. A1 - Liefbroer, A.C. A1 - Philipov, D. T1 - The postponement of childbearing in Europe: Driving forces and implications Y1 - 2006 DO - 10.1553/populationyearbook2006s1 JF - Vienna Yearbook of Population Research 2006 SP - 1 EP - -17 ER -