@article{ref1,
title="Effect of shift work with an irregular work and rest schedule on objective sleep indices",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1977",
author="Shkol'nikov, B. I. and Shakhnarovich, V. M. and Goncharenko, A. M. and Rotenberg, V. S.",
volume="",
number="7",
pages="18-21",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}