A. A. Dorogovtsev, “Visiting measures and an ergodic theorem for a sequence of iterations with random perturbations”, Ukr. Mat. Zhurn., vol. 51, no. 1, pp. 123–127, Jan. 1999, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4590