@article{ref1,
title="A sequential test of randomness for events occurring in time or space",
journal="Biometrika",
year="1956",
author="Bartholomew, D. J.",
volume="43",
number="1-2",
pages="64-78",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0006-3444",
doi="10.1093/biomet/43.1-2.64",
url="http://dx.doi.org/10.1093/biomet/43.1-2.64"
}