Carvalho, V. O., Guimarães, G. V., Ciolac, E. G., & Bocchi, E. A. (2008). Heart rate dynamics during a treadmill cardiopulmonary exercise test in optimized beta-blocked heart failure patients . Clinics, 63(4), 479-482. https://doi.org/10.1590/S1807-59322008000400011