@article{Kannisto1994,
author = {Kannisto, V. and Lauritsen, J. and Thatcher, A.R. and and Vaupel, J.W. },
title= {Reductions in Mortality at Advanced Ages: Several Decades of Evidence from 27 Countries. },
year = {1994},
doi = {10.2307/2137662},
journal = {Population and Development Review },
volume = {24},
number = {1},
pages = {793--810},
}