Markus, A. S.; Nikol’skaya, L. N.; Nikol’skij, N. K. Unitary spectrum of a contraction in Banach space. (English) Zbl 0277.47009 J. Sov. Math. 2, 112-119 (1974). MSC: 47A45 47A10 47B15 PDFBibTeX XMLCite \textit{A. S. Markus} et al., J. Sov. Math. 2, 112--119 (1974; Zbl 0277.47009) Full Text: DOI
Markus, A. S.; Nikol’skaya, L. N.; Nikol’skij, N. K. On the unitary spectrum of a contraction in a Banach space. (Russian) Zbl 0265.47008 Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 22, 65-74 (1971). MSC: 47A10 47A45 47B15 PDFBibTeX XMLCite \textit{A. S. Markus} et al., Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 22, 65--74 (1971; Zbl 0265.47008) Full Text: EuDML