@article{ref1,
title="Modes and natural frequencies of suspension-bridge oscillations",
journal="Annals of the New York Academy of Sciences",
year="1959",
author="Steinman, D. B.",
volume="79",
number="4",
pages="111-142",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-8923",
doi="10.1111/j.1749-6632.1959.tb42778.x",
url="http://dx.doi.org/10.1111/j.1749-6632.1959.tb42778.x"
}