@article{ref1,
title="Maximum load due to a crowd of people",
journal="Scientific American",
year="1905",
author="",
volume="92",
number="16",
pages="320-320",
abstract="A discussion of experiments to determine the maximum number of people who may appear in a given space safely without compromising the stability of a structure such as a footbridge, elevator, or balcony.<p /><p>Language: en</p>",
language="en",
issn="0036-8733",
doi="",
url="http://dx.doi.org/"
}