@article{article7301260b,
title   = {Incentive spirometry in major surgeries: a systematic review},
author = {Carvalho, Celso R. F. and Paisani, Denise M. and Lunardi, Adriana C.},
year = {2011},
doi = {10.1590/s1413-35552011005000025},
journal   = {Revista brasileira de fisioterapia}
}