@article{ref1,
title="A health survey on the aged with a 5-year follow-up",
journal="Acta socio-medica Scandinavica, Supplement",
year="1970",
author="Sourander, L. B. and Ruikka, I. and Kasanen, A.",
volume="3",
number="",
pages="1-41",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0301-7664",
doi="",
url="http://dx.doi.org/"
}