@article{ref1,
title="A brief explanation of the air traffic controller professional activity",
journal="Revista brasileira de hematologia e hemoterapia",
year="2011",
author="Ferreira Filho, Bemildo Alvaro",
volume="33",
number="3",
pages="175-176",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1516-8484",
doi="10.5581/1516-8484.20110047",
url="http://dx.doi.org/10.5581/1516-8484.20110047"
}