@article{Bourdelais1999,
author = {Bourdelais, P.},
title= {Demographic aging: A notion to revisit},
year = {1999},
doi = {10.1016/S1081-602X(99)80264-4},
journal = {The History of the Family: An International Quarterly},
volume = {4},
number = {1},
pages = {31--50},
}