1. A. N. Kolmogorov and Yu. V. Prokhorov, Usp. Mat. Nauk 4(4), 168–172 (1949).
2. A. A. Borovkov, Probability Theory (Editorial URSS, Moscow, 1999) [in Russian].
3. V. M. Kruglov and V. Yu. Korolev, Limit Theorems for Random Sums (Mosk. Gos. Univ., Moscow, 1990) [in Russian].
4. B. A. Sevastyanov, Branching Processes (Nauka, Moscow, 1971) [in Russian].
5. M. A. Krasnosel’skii and Ya. B. Rutitskii, Convex Functions and Orlicz Spaces (Fizmatlit, Moscow, 1958) [in Russian].