@inproceedings{inproceedings97a07853,
title   = {Sleeping during the night work may be correlated to long night shifts and / or variable night work hours},
author = {Rotenberg, L and Moreno, Claudia Roberta de Castro and Benedito-Silva, Ana Amélia and Menna Barreto, Luiz Silveira and Fischer, Frida Marina},
year = {1995},
booktitle   = {Latin-American Symposium on Chronobiology}
}