TY - JOUR A1 - Hoppmann, C.A. A1 - Klumb, P.L. T1 - Grandparental investment facilitates harmonization of work and family in employed parents: a lifespan psychological perspective Y1 - 2010 DO - 10.1017/S0140525X09991658 JF - Behavioral and Brain Sciences VL - 33 IS - 1 ER -