Kangkang, Wang. 2011. “A Class of Strong Limit Theorems for Nonhomogeneous Markov Chains Indexed by a Generalized Bethe Tree on a Generalized Random Selection System”. Ukrains’kyi Matematychnyi Zhurnal 63 (10), 1336-51. https://umj.imath.kiev.ua/index.php/umj/article/view/2810.