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<strong>BULETIN FISIKA</strong>, [S.l.], v. 20, n. 1, p. 6-10, feb. 2019.
ISSN 2580-9733.
Available at: &lt;<a href="http://103.29.196.112/index.php/buletinfisika/article/view/45366" target="_new">http://103.29.196.112/index.php/buletinfisika/article/view/45366</a>&gt;. Date accessed: 16 dec. 2025.