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<strong>Revista Cubana de Física</strong>, [S.l.], v. 29, n. 1, p. 4-7, june 2012.
ISSN 2224-7939.
Available at: &lt;<a href="https://revistacubanadefisica.org/index.php/rcf/article/view/RCF_29-1_04_2012" target="_new">https://revistacubanadefisica.org/index.php/rcf/article/view/RCF_29-1_04_2012</a>&gt;. Date accessed: 28 apr. 2024.