@article{ref1,
title="Prevalence and type of traumatic injuries to the anterior teeth of preschool children",
journal="Journal of pedodontics",
year="1979",
author="Ferguson, F. S. and Ripa, L. W.",
volume="4",
number="1",
pages="3-8",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0145-5508",
doi="",
url="http://dx.doi.org/"
}