@article{Caselli2006,
author = {Caselli, Graziella and Lipsi, Rosa Maria},
title= {Survival differences among the oldest old in Sardinia: who, what, where, and why?},
year = {2006},
doi = {10.4054/DemRes.2006.14.13},
journal = {Demographic Research},
volume = {14},
number = {13},
pages = {267--294},
}