@article{ref1,
title="Plasma amino acids and suicidal behaviour: Focus on tryptophan",
journal="Nervenheilkunde",
year="1992",
author="Demling, J. and Langer, K. and Thurn, U. and Van Sprang, A.",
volume="11",
number="7",
pages="344-349",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0722-1541",
doi="",
url="http://dx.doi.org/"
}