@article{ref1,
title="Migraine attacks triggered by mild head trauma, and their relation to certain post-traumatic disorders of childhood",
journal="Journal of neurology, neurosurgery, and psychiatry",
year="1969",
author="Haas, D. C. and Sovner, R. D.",
volume="32",
number="6",
pages="548-554",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3050",
doi="",
url="http://dx.doi.org/"
}