@inbook{Vallin2006,
author = {Vallin, J. and Caselli, G. },
title= {The hypothetical cohort as a tool for demographic analysis},
year = {2006},
editor = {Caselli, G.},
editor = {Vallin, J.},
editor = {Wunsch, G.},
booktitle = {Demography: Analysis And Synthesis; A Treatise in Population Studies, Volume I},
address = {Burlington MA},
publisher = {Academic Press},
pages = {163--195},
}