@article{Seligman2016,
author = {Seligman, B. and Greenberg, G. and Tuljapurkar, S.},
title= {Equity and length of lifespan are not the same},
year = {2016},
doi = {10.1073/pnas.1601112113},
volume = {113},
number = {30},
pages = {8420--8423},
}