@article{Murphy2006,
author = {Murphy, M. and Martikainen, P. and Pennec, S.},
title= {Demographic change and the supply of potential family supporters in Britain, Finland and France in the period 1911-2050},
year = {2006},
doi = {10.1007/s10680-006-9003-8},
journal = {European Journal of Population},
volume = {22},
number = {3},
pages = {219--240},
}