GUPTA, S. C.; SRIVASTAVA, O. P. A branching process with immigration and emigration. Statistica, [S. l.], v. 52, n. 4, p. 521–528, 1992. DOI: 10.6092/issn.1973-2201/920. Disponível em: https://rivista-statistica.unibo.it/article/view/920. Acesso em: 2 dec. 2021.