Khrystyna Prysyazhnyk, Iryna Bazylevych, Ludmila Mitkova, Iryna Ivanochko, “Period-Life of a Branching Process with Migration and Continuous Time”, Mathematics, 9:8 (2021), 868
V. A. Vatutin, E. E. D'yakonova, “Subcritical branching processes in random environment with immigration: Survival of a single family”, Theory Probab. Appl., 65:4 (2021), 527–544