PUPAVAC, Drago; MARŠANIĆ, Robert; KRPAN, Ljudevit. Optimization of COVID-19-Free Supply Chains. Promet - Traffic&Transportation, [S. l.], v. 33, n. 2, p. 259–266, 2021. DOI: 10.7307/ptt.v33i2.3643. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2927. Acesso em: 26 aug. 2025.