JAYSWAL, Anurag; JHA, Shalini. Second order symmetric duality in fractional variational problems over cone constraints. Yugoslav Journal of Operations Research, [S. l.], v. 28, n. 1, p. 39–57, 2018. DOI: 10.2298/YJOR161217019J. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/525. Acesso em: 26 aug. 2025.