@techreport{Spielauer2007,
author = {Spielauer, M. and Kostova, D. and Koytcheva, E.},
title= {First and second births in first and second unions: a decomposition of fertility decline in Bulgaria and Russia since the 1989 economic and political transition},
year = {2007},
publisher = {Max Planck Institute for Demographic Research},
address = {Rostock},
institution = {MPIDR Working Paper; WP-2007-001},
}