TY - JOUR A1 - Geurts, T. A1 - Poortman, A.-R. A1 - van Tilburg, T.G. T1 - Older Parents Providing Child Care for Adult Children: Does It Pay Off? Y1 - 2012 DO - 10.1111/j.1741-3737.2011.00952.x JF - Journal of Marriage and Family VL - 74 IS - 2 ER -