Blackwell, D. Idempotent Markoff chains. (English) Zbl 0063.00419 Ann. Math. (2) 43, 560-567 (1942). Not reviewed Cited in 4 Documents PDFBibTeX XMLCite \textit{D. Blackwell}, Ann. Math. (2) 43, 560--567 (1942; Zbl 0063.00419) Full Text: DOI