@article{ref1,
title="Why we permute blocks?",
journal="International journal of injury control and safety promotion",
year="2015",
author="Bangdiwala, Shrikant I.",
volume="22",
number="3",
pages="278-280",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1745-7300",
doi="10.1080/17457300.2015.1063822",
url="http://dx.doi.org/10.1080/17457300.2015.1063822"
}