V. V. . Korolyuk, “Central limiting theorem for nonuniform processes with independent increments with semi-Markovian change overs”, Ukr. Mat. Zhurn., vol. 43, no. 1, pp. 134–137, Jan. 1991, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9319