@article{ref1,
title="Comparative study of evacuation efficiency using stairs and elevators in high-rise buildings",
journal="Journal of applied fire science",
year="2013",
author="Kongjin, Zhu and Lizhong, Yang and Xin, Zhan and Yuanchun, Ding",
volume="23",
number="1",
pages="105-113",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="1044-4300",
doi="10.2190/AF.23.1.g",
url="http://dx.doi.org/10.2190/AF.23.1.g"
}