Bellman, Richard; Harris, Theodore E. On the theory of age-dependent stochastic branching processes. (English) Zbl 0041.45604 Proc. Natl. Acad. Sci. USA 34, 601-604 (1948). PDFBibTeX XMLCite \textit{R. Bellman} and \textit{T. E. Harris}, Proc. Natl. Acad. Sci. USA 34, 601--604 (1948; Zbl 0041.45604) Full Text: DOI
Harris, T. E. Branching processes. (English) Zbl 0041.45603 Ann. Math. Stat. 19, 474-494 (1948). PDFBibTeX XMLCite \textit{T. E. Harris}, Ann. Math. Stat. 19, 474--494 (1948; Zbl 0041.45603) Full Text: DOI
Sevast’yanov, B. A. Zur Theorie der sich verzweigenden unendlichen Prozesse. (Russian) Zbl 0041.45601 Dokl. Akad. Nauk SSSR, n. Ser. 59, 1407-1410 (1948). PDFBibTeX XMLCite \textit{B. A. Sevast'yanov}, Dokl. Akad. Nauk SSSR, n. Ser. 59, 1407--1410 (1948; Zbl 0041.45601)