@article{Buettner2002,
author = {Buettner, T.},
title= {Approaches and experiences in projecting mortality patterns for the oldest old},
year = {2002},
doi = {10.1080/10920277.2002.10596053},
journal = {North American Actuarial Journal },
volume = {6},
number = {3},
pages = {14--25},
}