@article{ref1,
title="Depressive syndromes in childhood and adolescence. Symptomatology, etiology and prognosis",
journal="Monographien aus dem Gesamtgebiete der Psychiatrie",
year="1971",
author="Nissen, G.",
volume="4",
number="",
pages="1-174",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0077-0671",
doi="",
url="http://dx.doi.org/"
}