@article{ref1,
title="Head-Up Displays: Effect of Clutter, Display Intensity, and Display Location on Pilot Performance",
journal="International journal of aviation psychology",
year="1998",
author="Ververs, P. M. and Wickens, Christopher D.",
volume="8",
number="4",
pages="377-403",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="1050-8414",
doi="10.1207/s15327108ijap0804_4",
url="http://dx.doi.org/10.1207/s15327108ijap0804_4"
}