Y. M. Chabanyuk, “Asymptotic normality of a discrete procedure of stochastic approximation in a semi-Markov medium”, Ukr. Mat. Zhurn., vol. 58, no. 10, pp. 1425–1433, Oct. 2006, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3543