On The Queuing System M/Er/1/N. Baghdad Science Journal, Iraq, Baghdad, v. 9, n. 2, p. 367–371, 2012. DOI: 10.21123/bsj.2012.9.2.367-371. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1372.. Acesso em: 1 may. 2024.