@article{ref1,
title="The study of human aggression. Some remarks preceding and following the showing of the film 'Because I left my bicycle there' by Louis van Gasteren",
journal="Psychotherapy and psychosomatics",
year="1972",
author="Groen, J. J.",
volume="20",
number="5",
pages="312-315",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-3190",
doi="",
url="http://dx.doi.org/"
}