@article{Perelli-Harris2010,
author = {Perelli-Harris, B., Sigle-Rushton, W., Kreyenfeld, M., Lappegård, T., Keizer, R., Berghammer, C.},
title= {The educational gradient of childbearing within cohabitation in Europe},
year = {2010},
doi = {10.1111/j.1728-4457.2010.00357.x},
journal = {Population and Development Review },
volume = {36},
number = {4},
pages = {775--801},
}