K. ANITHA; S. MARAGATHASUNDARI; M. BALA. Queuing System of Bulk Arrival Model With Optional Services in Third Stage and Two Different Vacation Policies. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 4 - E, p. 711–721, 2017. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1330. Acesso em: 20 may. 2024.