@article{ref1,
title="Dental injuries in Copenhagen schoolchildren, school years 1967-1972",
journal="Community dentistry and oral epidemiology",
year="1974",
author="Ravn, J. J.",
volume="2",
number="5",
pages="231-245",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0301-5661",
doi="",
url="http://dx.doi.org/"
}