@inbook{Serow1991,
author = {Serow, W.J. and Sly, D.F.},
title= {Geographic mobility of the elderly in industrialized societies},
year = {1991},
editor = {Lutz, W.},
booktitle = {Future Demographic Trends in Europe and North America: What Can We Assume Today?},
address = {London},
publisher = {Academic Press},
pages = {399--419},
}