2 citations to https://www.mathnet.ru/eng/extr1

1. V. A. Vatutin, C. Smadi, “Critical Branching Processes in a Random Environment with Immigration: The Size of the Only Surviving Family”, Proc. Steklov Inst. Math., 316 (2022), 336–355          
2. Valeriy Ivanovich Afanasyev, “Limit theorems for a strongly supercritical branching process with immigration in random environment”, Stoch. Qual. Control, 36:2 (2021), 129–143