@article{ref1,
title="Engineering for crowd safety : edited by r.a. smith and j.f. dickie. elsevier science b.v., amsterdam, 1993, pp. 428",
journal="Safety science",
year="1995",
author="Donald, I",
volume="21",
number="1",
pages="80-82",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0925-7535",
doi="",
url="http://dx.doi.org/"
}