Lysetskyi, T. B. “Total Progeny in the Near-Critical Multi-Type Galton-Watson Processes With Immigration”. Matematychni Studii 62, no. 2 (December 13, 2024): 211-222. Accessed April 9, 2025. http://matstud.org.ua/ojs/index.php/matstud/article/view/572.