@article{Cheung2005,
author = {Cheung, Siu Lan Karen and Robine, Jean-Marie and Tu, Edward Jow-Ching and Caselli, Graziella},
title= {Three Dimensions of the Survival Curve: Horizontalization, Verticalization, and Longevity Extension},
year = {2005},
doi = {10.1353/dem.2005.0012},
journal = {Demography},
volume = {42},
number = {2},
pages = {243--258},
}