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ISSN 2224-7939.
Available at: &lt;<a href="https://revistacubanadefisica.org/index.php/rcf/article/view/RCF_32-2_096_2015" target="_new">https://revistacubanadefisica.org/index.php/rcf/article/view/RCF_32-2_096_2015</a>&gt;. Date accessed: 07 sep. 2024.