@article{ref1,
title="Additive versus multiplicative combination of drive and incentive",
journal="Psychological reports",
year="1960",
author="Hulicka, Irene Mackintosh",
volume="6",
number="3",
pages="403-409",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-2941",
doi="10.2466/pr0.1960.6.3.403",
url="http://dx.doi.org/10.2466/pr0.1960.6.3.403"
}