IBRAHIM, Muhammad Akram Ramadhan; JAINI, Nor Izzati; BAHALUDIN, Hafizah. A Study of Oil and Gas Producers Subsector Portfolio Using the Trade-off Ranking Method. Yugoslav Journal of Operations Research, [S. l.], v. 35, n. 1, p. 69–84, 2024. DOI: 10.2298/YJOR230815021I. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/818. Acesso em: 28 jul. 2025.