Abstract We consider the sequence ξ n, t t ≥1 of controlled critical branching processes with immigration, where n = 1, 2, … is an integer parameter limiting the population size. It is shown that for n → ∞ the stationary distributions of considered branching processes normalized by n array n array converge to the distribution of a random variable whose square has a gamma distribution.
V. I. Vinokurov (Sun,) studied this question.