@techreport{Kreyenfeld2010,
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 = {2010},
publisher = {Max Planck Institute for Demographic Research },
address = {Rostock},
number = {MPIDR Working Paper 2011-003},
}