@article{ref1,
title="Competition and extrinsic rewards: effect on intrinsic motivation and attribution",
journal="Research quarterly",
year="1979",
author="Weinberg, R. S. and Jackson, A.",
volume="50",
number="3",
pages="494-502",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0034-5377",
doi="",
url="http://dx.doi.org/"
}