KOVALENKO, I. N. Estimation of the Intensity of the Flow of Nonmonotone Refusals in the Queuing System $(≤ λ)/G/m$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 9, p. 1219–1225, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4529. Acesso em: 17 apr. 2025.