@inbook{Kannisto1999,
author = {Kannisto, V.},
title= {Assessing the information on age at death of old persons in national vital statistics.In},
year = {1999},
editor = {Jeune, B.},
editor = {Vaupel, J.W.},
booktitle = {Validation of exceptional longevity},
address = {Odense},
publisher = {Odense University Press},
}