PilipenkoA. Yu., and Prikhod’koYu. E. “On the Limit Behavior of a Sequence of Markov Processes Perturbed in a Neighborhood of the Singular Point”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 4 (April 25, 2015): 499-516. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2000.