@article{ref1,
title="The stress seekers: a psychological study of sports parachutists, racing drivers, and football players",
journal="Journal of sports medicine and physical fitness",
year="1975",
author="Johnsgard, K. and Ogilvie, B. and Merritt, K.",
volume="15",
number="2",
pages="158-169",
abstract="<p>[Abstract unavailable]  Keywords: American football; Altitude sports; Automobile racing</p> <p>Language: en</p>",
language="en",
issn="0022-4707",
doi="",
url="http://dx.doi.org/"
}