@article{ref1,
title="About the traumatic injuries of the teeth and the peridental tissues",
journal="Nauchni Trudove na Visshiia Meditsinski Institut, Sofiia",
year="1964",
author="Davidov, S. and Penev, Z.",
volume="43",
number="",
pages="61-66",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0525-0889",
doi="",
url="http://dx.doi.org/"
}