@article{ref1,
title="Basic problems in the psychology of motivation",
journal="Activitas nervosa superior",
year="1971",
author="Nakonecný, M.",
volume="13",
number="4",
pages="293-302",
abstract="<p>[Abstract unavailable]</p> <p>Language: cs</p>",
language="cs",
issn="0001-7604",
doi="",
url="http://dx.doi.org/"
}