@article{ref1,
title="Frequency of cannabis use by adolescents: distribution conforming to the Ledermann model",
journal="Bulletin de l'Academie Nationale de Medecine",
year="1982",
author="Nahas, G.",
volume="166",
number="4",
pages="509-513",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0001-4079",
doi="",
url="http://dx.doi.org/"
}