Chabanyuk, Ya. M. “ Continuous Procedure of Stochastic Approximation in a Semi-Markov Medium”.
Ukrains’kyi Matematychnyi Zhurnal
56, no. 5 (May 25, 2004): 713–720. Accessed April 27, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/3792
.