@article{ref1,
title="Differentiation of hypothalamic drive and reward centers",
journal="American journal of physiology",
year="1971",
author="Olds, J. and Allan, W. S. and Briese, E.",
volume="221",
number="1",
pages="368-375",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9513",
doi="",
url="http://dx.doi.org/"
}