LETIĆ, Duško; JEVTIĆ, Vesna. The distribution of time for Clark’s flow and risk assessment for the activities of pert network structure. Yugoslav Journal of Operations Research, [S. l.], v. 19, n. 1, p. 195–207, 2009. DOI: 10.2298/YJOR0901195L. Disponível em: https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/265. Acesso em: 30 nov. 2025.