ABO-SINNA, Mahmoud A. Stability of multi-objective bi-level linear programming problems under fuzziness. Yugoslav Journal of Operations Research, [S. l.], v. 23, n. 3, p. 343–354, 2013. DOI: 10.2298/YJOR120119016A. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/370. Acesso em: 26 aug. 2025.