@article{Perelli-Harris2010,
author = {Perelli-Harris, B. and Sigle-Rushton, W. and Kreyenfeld, M. and Lappegard, T. and Berghammer, C. and Keizer, R.},
title= {The educational grandient of childbearing within cohabitation in Europe},
year = {2010},
doi = {10.1111/j.1728-4457.2010.00357.x},
journal = {Population and Development Review},
volume = {36},
pages = {775−801},
}