@article{ref1,
title="Tolerance to shift of sleep, as related to the individual's circadian phase position",
journal="Ergonomics",
year="1978",
author="Breithaupt, H. and Hildebrandt, G. and Dohre, D. and Josch, R. and Sieber, U. and Werner, M.",
volume="21",
number="10",
pages="767-774",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}