R. VIMALA DEVI; S. SUGANYA. Two Heterogeneous Service Queue With Second Optional Repair Subject to Reneging During Compulsory Vacation and Breakdown Time. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 3, p. 7–14, 2018. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/354. Acesso em: 4 may. 2024.