@article{articlec1f15688,
title   = {Sleeping on the job during night shifts may be associated with extended night shifts and / or variable night shift ouset times},
author = {Rotenberg, L and Moreno, Claudia Roberta de Castro and Benedito-Silva, Ana Amélia and Menna Barreto, Luiz Silveira and Fischer, Frida Marina},
year = {1996},
journal   = {Biological Rhythm Research}
}