ChabanyukY. M. “Asymptotic Normality of Fluctuations of the Procedure of Stochastic Approximation With Diffusive Perturbation in a Markov Medium”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 58, no. 12, Dec. 2006, pp. 1686–1692, https://umj.imath.kiev.ua/index.php/umj/article/view/3564.