Vardanyan, Kh. L. “ON THE QUEUEING MODEL WITH NEGATIVE CUSTOMERS”. Proceedings of the YSU A: Physical and Mathematical Sciences 39, no. 1 (206) (February 28, 2005): 22–26. Accessed July 22, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol39_no1_2005_pp022-026.