VARGA, J. et al.
 Effect of Age and Life Characteristics on Variations of the Heart Rate Variability Parameters among Active Manual Workers.
<strong>Medical Research Archives</strong>, [S.l.], v. 9, n. 10, oct. 2021.
ISSN 2375-1924.
Available at: &lt;<a href="https://esmed.org/MRA/mra/article/view/2564" target="_new">https://esmed.org/MRA/mra/article/view/2564</a>&gt;. Date accessed: 20 apr. 2024.
doi: <a href="https://doi.org/10.18103/mra.v9i10.2564">https://doi.org/10.18103/mra.v9i10.2564</a>.