NARANG, Ritu; ARORA, S.R. An enumerative algorithm for non-linear multi-level integer programming problem. Yugoslav Journal of Operations Research, [S. l.], v. 19, n. 2, p. 263–279, 2009. DOI: 10.2298/YJOR0902263N. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/270. Acesso em: 25 aug. 2025.