@inbook{Keilman2001,
author = {Keilman, N.},
title= {Demographic translation: From period to cohort and back},
year = {2001},
editor = {Caselli, G.},
editor = {Vallin, J.},
editor = {Wunsch, G.},
booktitle = {La dynamique des populations [Demography: Analysis and synthesis},
address = {Paris},
publisher = {INED},
pages = {359--378},
}