@article{ref1,
title="A Case of Lack of Speech Due to Negativism",
journal="Psychol Clin",
year="1929",
author="Rigby, Madella",
volume="18",
number="5",
pages="156-161",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}