@techreport{Kreyenfeld2011,
author = {Kreyenfeld, M. and Zeman, K. and Burkimsher, M. and Jaschinski, I. },
title= {Fertility data for German-speaking countries: What is the potential? Where are the pitfalls?},
year = {2011},
publisher = {Max Planck Institute for Demographic Research},
address = {Rostock},
}