@article{Tuljapurkar2000,
author = {Tuljapurkar, S and Li, N and Boe, C},
title= {A universal pattern of mortality decline in the G7 countries.},
year = {2000},
URL = {10.1038/35015561},
journal = {Nature},
volume = {405},
number = {6788},
pages = {789--792},
}