GABRIEL, Erwin.
 Table of Contents.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 37, n. 2, dec. 2016.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/5537" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/5537</a>&gt;. Date accessed: 30 sep. 2025.