@article{ref1,
title="Urban transportation in North America, Part 2: Rapid rail transit",
journal="Transportation planning and technology",
year="1976",
author="Hoel, Lester A.",
volume="3",
number="3",
pages="185-192",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0308-1060",
doi="10.1080/03081067608717105",
url="http://dx.doi.org/10.1080/03081067608717105"
}