STANOJEVIĆ, Bogdana; STANOJEVIĆ, Milan. Penalty method for fuzzy linear programming with trapezoidal numbers. Yugoslav Journal of Operations Research, [S. l.], v. 19, n. 1, p. 149–156, 2009. DOI: 10.2298/YJOR0901149S. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/261. Acesso em: 26 aug. 2025.