@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 gradient of nonmarital childbearing in Europe: emergence of a pattern of disadvantage?",
year = 2010,
journal = "MPIDR Working Paper",
volume = 004,
pages = "1-43",
url = "http://www.demogr.mpg.de/papers/working/wp-2010-004.pdf"
}