@article{ref1,
title="Psychiatric problems in childhood and adolescence",
journal="Psychiatrie, Neurologie, und Medizinische Psychologie",
year="1969",
author="von KEYSERLINGK, H.",
volume="21",
number="6",
pages="212-218",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0033-2739",
doi="",
url="http://dx.doi.org/"
}