Litvinov, A. N. “Asymptotic Analysis of the Distribution of Random Variables Connected in a Markov Chain”. Ukrains’kyi Matematychnyi Zhurnal 18, no. 4 (June 28, 1966): 11–21. Accessed April 14, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/8309.