@inbook{Bourdelais2006,
author = {Bourdelais, P. and Gourdon, V.},
title= {Demographic categories revisited. Age categories and the age of the categories},
year = {2006},
editor = {Sauvain-Dugerdil, C.},
editor = {Leridon, H.},
editor = {Mascie-Taylor, N.},
booktitle = {Human Clock. The Bio-cultural Meanings of Age. Vol. 5, Population, Family, and Society},
address = {Bern},
publisher = {Peter Lang},
pages = {245--269},
}