Pogorui A. О., “Stationary distribution of a process of random semi-Markov evolution with delaying screens in the case of balance”, Ukr. Mat. Zhurn., vol. 58, no. 3, pp. 381–387, Mar. 2006, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3461