@inbook{Billari2002, author = {Billari, F.C. and Castiglioni, M. and Castro Martín, T. and Michielin, F. and Ongaro, F.}, title= {Household and union formation in a Mediterranean fashion: Italy and Spain}, year = {2002}, editor = {Klijzing, E.}, editor = {Corijn, M.}, booktitle = {Dynamics of fertility and partnership in Europe:Iinsights and lessons from comparative research}, address = {New York}, publisher = {United Nations}, pages = {17--41}, series = {Volume 2}, }