@article{ref1,
title="Social trends and social problems",
journal="Children and youth services review",
year="1990",
author="",
volume="12",
number="1-2",
pages="14-15",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0190-7409",
doi="10.1016/0190-7409(90)90025-S",
url="http://dx.doi.org/10.1016/0190-7409(90)90025-S"
}