@article{ref1,
title="Noncompliance and dropouts as a problem of longitudinal studies in child psychology",
journal="Social psychiatry and psychiatric epidemiology",
year="1988",
author="Allehoff, W. H. and Esser, Günter and Schmidt, M. H.",
volume="23",
number="2",
pages="114-120",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0933-7954",
doi="",
url="http://dx.doi.org/"
}