Moskal’tsovaN. V. and ShurenkovV. M. (1993) “On asymptotics of the potential of a countable ergodic Markov chain”, Ukrains’kyi Matematychnyi Zhurnal, 45(2), pp. 265–269. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5808 (Accessed: 27July2024).