VIRAY, Francisco L..
 A Continuous Mining System Productivity Model in Terms of Equipment Reliability.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 3, n. 2, nov. 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pej/article/view/8355" target="_new">https://journals.upd.edu.ph/index.php/pej/article/view/8355</a>&gt;. Date accessed: 09 sep. 2025.