TY - JOUR A1 - Rees, P. A1 - Gaag, N. A1 - Beer, J. A1 - Heins, F. T1 - European regional populations: Current trends, future pathways, and policy options Y1 - 2012 DO - 10.1007/s10680-012-9268-z VL - 28 IS - 4 ER -