@book{507100,
	author = {Wagner, M. and Brandt, M.},
	title = {Loneliness among informal caregivers aged 50+ in Europe. En: Ageing in Europe. Supporting policies for an inclusive society},
	publisher = {Walter de Gruyter},
	year = {2015},
	address = {Berlín},
	url = {http://www.siis.net/documentos/ficha/507100.pdf}
}