@article{ref1,
title="Prognosis of depressed skull fracture",
journal="Acta chirurgica Scandinavica",
year="1973",
author="Heiskanen, O. and Marttila, I. and Valtonen, S.",
volume="139",
number="7",
pages="605-608",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-5482",
doi="",
url="http://dx.doi.org/"
}