@inbook{Keilman2006,
author = {Keilman, N.},
title= {Demographic translation: from period to cohort perspective and back},
year = {2006},
editor = {Caselli, G.},
editor = {Vallin, J.},
editor = {Wunsch, G. },
booktitle = {Demography: analysis and synthesis},
address = {Amsterdam et al.},
publisher = {Elsevier},
pages = {215--225},
}