@article{ref1,
title="Stuttering as conflict. I. Comparison of therapy techniques involving approach and avoidance",
journal="Journal of speech and hearing disorders",
year="1957",
author="Sheehan, J. G. and Voas, Robert B.",
volume="22",
number="5",
pages="714-723",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-4677",
doi="",
url="http://dx.doi.org/"
}