@inbook{Kreyenfeld2006,
author = {Kreyenfeld, M.},
title= {Family Formation in East and West Germany before and after Unification},
year = {2006},
editor = {Gustafsson, S.},
editor = {Kalwij, A.},
booktitle = {Education and Postponement of Maternity},
address = {Springer},
pages = {225--236},
}