@article{ref1,
title="Some issues in the development of a motion sickness questionnaire for flight students",
journal="Aerospace medicine",
year="1963",
author="Hardacre, L. E. and Kennedy, P. S.",
volume="34",
number="",
pages="401-402",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}