@article{ref1,
title="The Zurich Study: X Hypomania in a 28- to 30-year-old cohort",
journal="European archives of psychiatry and clinical neuroscience",
year="1991",
author="Wicki, W. and Angst, Jules",
volume="240",
number="6",
pages="339-348",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0940-1334",
doi="10.1007/BF02279764",
url="http://dx.doi.org/10.1007/BF02279764"
}