@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 = {Lanham},
publisher = {Rowman and Littlefield},
pages = {48--109},
}