IBRAHIM, Muhammad Akram Ramadhan; 						JAINI, Nor Izzati; 						BAHALUDIN, Hafizah.
 A Study of Oil and Gas Producers Subsector Portfolio Using the Trade-off Ranking Method.
<strong>Yugoslav Journal of Operations Research</strong>, [S.l.], june 2024.
ISSN 2334-6043.
Available at: &lt;<a href="https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/1276" target="_new">https://yujor.fon.bg.ac.rs/index.php/yujor/article/view/1276</a>&gt;. Date accessed: 22 dec. 2024.
doi: <a href="https://doi.org/10.2298/YJOR230815021I">https://doi.org/10.2298/YJOR230815021I</a>.