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MLA Citation
Marianne Penachini da Costa de Rezende Barbosa et al.. “Comparison of Polar® RS800G3™ heart rate monitor with Polar® S810i™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest.” Clinical physiology and functional imaging, vol. 36, n.d., pp. 112–117. http://access.bl.uk/ark:/81055/vdc_100028782331.0x000001