@article{ref1,
title="Marihuana",
journal="Nederlands Tijdschrift voor Geneeskunde",
year="1968",
author="Geerlings, P. J.",
volume="112",
number="39",
pages="1739-1742",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0028-2162",
doi="",
url="http://dx.doi.org/"
}