CRUZ, Ibarra E..
 Studies on the Practical Application of Producer Gas from Agricultural Residues as Supplementary Fuel for Diesel Engines.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 1, n. 1, dec. 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pej/article/view/8478" target="_new">https://journals.upd.edu.ph/index.php/pej/article/view/8478</a>&gt;. Date accessed: 30 sep. 2025.