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<strong>Science Diliman: A Journal of Pure and Applied Sciences</strong>, [S.l.], v. 24, n. 2, may 2013.
ISSN 2012-0818.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/sciencediliman/article/view/3734" target="_new">https://journals.upd.edu.ph/index.php/sciencediliman/article/view/3734</a>&gt;. Date accessed: 31 aug. 2025.