LOTFI, Farhad Hosseinzadeh; HAJIHOSSEINI, Alireza. Fuzzy congestion in data envelopment analysis. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 42, p. 330–340, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7235. Acesso em: 27 oct. 2026.