TY - JOUR A1 - Voorpostel, M. A1 - van der Lippe, T. A1 - Gershuny, J. T1 - Trends in free time with a partner: A transformation of intimacy? Y1 - 2009 DO - 10.1007/s11205-008-9383-8 VL - 93 IS - 1 ER -