@article{ref1,
title="Relative safety of traditional agricultural tractor power take-off (PTO) drivelines compared to fluid power--a review",
journal="Journal of agricultural safety and health",
year="2003",
author="Thomas, R. S. and Buckmaster, D. R.",
volume="9",
number="3",
pages="241-250",
abstract="Nearly all tractor PTO arrangements used today  consist of a rotating mechanical shaft with two or more universal joints and  splined couplings. Although this method of power transfer has been the standard  for decades, it continues to be a hazard to farm workers. Commonly, PTO  accidents involve the snagging of clothes, resulting in the victim being rapidly  and violently drawn into (and around) the rotating shaft. Entanglement injuries  are both common and severe in the agricultural workforce, with poor shielding  maintenance as a contributing factor. If PTO loads were driven with fluid power,  this entanglement hazard would be eliminated. With high-pressure injection  injury being the principal hazard, the fluid power alternative appears to pose a  lower risk in terms of both frequency of occurrence and severity of  injury.",
language="",
issn="1074-7583",
doi="",
url="http://dx.doi.org/"
}