TY - JOUR A1 - De Koker, B. T1 - Socio-demographic determinants of informal caregiving: Co-resident versus extra-resident care Y1 - 2009 DO - 10.1007/s10433-008-0103-7 JF - European Journal of Ageing VL - 6 IS - 1 SP - 3 EP - -15 ER -