-, -.
 Energy Engineering (EGY).
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 24, n. 2, aug. 2011.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/2477" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/2477</a>&gt;. Date accessed: 05 aug. 2025.