@article{Goldstein2006,
author = {Goldstein, J.R. and Wachter, K.W.},
title= {Relationships between period and cohort life expectancy: Gaps and lags},
year = {2006},
doi = {10.1080/00324720600895876},
journal = {Population Studies},
volume = {60},
number = {3},
pages = {257--269},
}