HERRERA, M. U.; 						SARMAGO, Roland V..
 Synthesis of PB-Free BI-2223 from BI-2212 Using Partial Melting.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 23, n. 2, aug. 2011.
ISSN 2718-9287.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pej/article/view/2378" target="_new">https://journals.upd.edu.ph/index.php/pej/article/view/2378</a>&gt;. Date accessed: 31 aug. 2025.