Imomov, A. A. “A Differential Analog of the Main Lemma of the Theory of Markov Branching Processes and Its Applications”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 2 (February 25, 2005): 258–264. Accessed May 12, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3593.