TY - JOUR A1 - Hogerbrugge, M.J.A. A1 - Dykstra, P.A. T1 - The Family Ties of Unmarried Cohabiting and Married Persons in the Netherlands Y1 - 2009 DO - 10.1111/j.1741-3737.2008.00585.x JF - Journal of Marriage and the Family VL - 71 SP - 135 EP - -145 ER -