BAHAGUE JR., R. R.; 						GALAPON, E. A..
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<strong>Science Diliman: A Journal of Pure and Applied Sciences</strong>, [S.l.], v. 15, n. 1, july 2007.
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Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/sciencediliman/article/view/139" target="_new">https://www.journals.upd.edu.ph/index.php/sciencediliman/article/view/139</a>&gt;. Date accessed: 30 sep. 2025.