DHINGRA, M.; LALITHA, C.S. Set optimization using improvement sets. Yugoslav Journal of Operations Research, [S. l.], v. 27, n. 2, p. 153–167, 2017. DOI: 10.2298/YJOR170115011D. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/497. Acesso em: 17 dec. 2025.