@article{perim_signorelli_araújo_2011,  title={Stability of relative oxygen pulse curve during repeated maximal cardiopulmonary testing in professional soccer players},  volume={44},  ISSN={0100-879X},  url={https://doi.org/10.1590/S0100-879X2011007500073},  DOI={10.1590/S0100-879X2011007500073},  number={7},  journal={Brazilian Journal of Medical and Biological Research},  publisher={Associação Brasileira de Divulgação Científica},  author={Perim, R.R. and Signorelli, G.R. and Araújo, C.G.S.},  year={2011},  month={Jul},  pages={700–706} }