@book{178483,
	author = {Wahrendorf, M. and Siegrist, J.},
	title = {Working conditions in mid-life and participation in voluntary work after labour market exit. En: The individual and the welfare state. Life histories in Europe},
	publisher = {Springer},
	year = {2011},
	address = {Londres},
	url = {http://dx.doi.org/10.1007/978-3-642-17472-8_16}
}