@article{ref1,
title="Contribution to the theory of accident Proneness. 2: True of false contagion",
journal="University of California publications in statistics",
year="1952",
author="Bates, Grace Elizabeth and Neyman, Jerzy",
volume="",
number="1",
pages="255-276",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="",
issn="",
doi="",
url="http://dx.doi.org/"
}