@article{Rosero-Bixby2008,
author = {Rosero-Bixby, L.},
title= {The exceptionally high life expectancy of Costa Rican nonagenarians},
year = {2008},
doi = {10.1353/dem.0.0011},
journal = {Demography},
volume = {45},
number = {3},
pages = {673--691},
}