@article{Igel2009,
author = {Igel, C. and Brandt, M. and Haberkern, K. and Szydlik, M.},
title= {Specialization between family and state. Intergenerational time transfers in Western Europe},
year = {2009},
journal = {Journal of Comparative Family Studies},
volume = {40},
number = {2},
pages = {203--226},
}