@techreport{Frejka2010,
author = {Frejka, T.},
title= {Cohort overlays of evolving childbearing patterns: How postponement and recuperation are reflected in period fertility trends},
year = {2010},
publisher = {Max Planck Institute for Demographic Research},
address = {Rostock},
number = {MPIDR working paper: WP-2010-026},
}