@article{ref1,
title="Crack cocaine. A new danger for children",
journal="American journal of diseases of children (1960)",
year="1990",
author="Heagarty, M. C.",
volume="144",
number="7",
pages="756-757",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0002-922X",
doi="",
url="http://dx.doi.org/"
}