SACHDEV, Geeta; VERMA, Khushboo; GULATI, T.R. Second-order symmetric duality in multiobjective variational problems. Yugoslav Journal of Operations Research, [S. l.], v. 29, n. 3, p. 295–308, 2019. DOI: 10.2298/YJOR180715019S. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/573. Acesso em: 26 aug. 2025.