Mühlbach, G. Lokale Saturation positiver linearer Operatoren. (German) Zbl 0285.41012 Mathematica, Cluj 14(37), 263-274 (1974). MSC: 41A40 41A35 PDFBibTeX XMLCite \textit{G. Mühlbach}, Mathematica, Cluj 14(37), 263--274 (1974; Zbl 0285.41012)
Leviatan, D.; Westphal, U. On the mean ergodic theorem and approximation. (English) Zbl 0292.47008 Mathematica, Cluj 15(38), 83-88 (1973). MSC: 47A35 41A25 41A65 41A40 PDFBibTeX XMLCite \textit{D. Leviatan} and \textit{U. Westphal}, Mathematica, Cluj 15(38), 83--88 (1973; Zbl 0292.47008)