@inbook{Kohler2006,
author = {Kohler, H-P. and Billari, F.C. and Ortega, J.A.},
title= {Low fertility in Europe: Causes, implications and policy options},
year = {2006},
editor = {Harris, F.R.},
booktitle = {The Baby Bust: Who Will Do the Work? who Will Pay the Taxes?},
address = {Maryland, USA},
publisher = {Rowman & Littlefield},
pages = {48--109},
}