@article{ref1,
title="Beliefs in internal-external control of reinforcement and participation in group and individual sports",
journal="Perceptual and motor skills",
year="1969",
author="Lynn, R. W. and Phelan, J. G. and Kiker, V. L.",
volume="29",
number="2",
pages="551-553",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}