@techreport{Perelli-Harris2009,
author = {Perelli-Harris, B. and Kreyenfeld, M. and Sigle-Rushton, W. and Keizer, R. and Lappegard, T. and Jasilioniene, A. and Berghammer, C. and Di Giulio, P. and Koeppen, K.},
title= {The increase in fertility in cohabitation across Europe: Examining the intersection between union status and childbearing. MPIDR Working Paper 2009-021},
year = {2009},
}