TY - JOUR A1 - Kulu, H. A1 - Boyle, P.J. A1 - Andersson, G. T1 - High fertility in city suburbs: evidence from four Northern European countries Y1 - 2009 DO - 10.4054/DemRes.2009.21.31 JF - Demographic Research VL - 21 IS - 31 ER -