Vol’berg, A. L.; Solomyak, B. M. Multiplicity of the spectrum for the operator of multiplication by a matrix-function. (Russian) Zbl 0693.47002 Funkts. Anal. Prilozh. 23, No. 3, 55-56 (1989). Reviewer: A.Torgašev MSC: 47A10 47A45 PDFBibTeX XMLCite \textit{A. L. Vol'berg} and \textit{B. M. Solomyak}, Funkts. Anal. Prilozh. 23, No. 3, 55--56 (1989; Zbl 0693.47002)
Vol’berg, A. L.; Solomyak, B. M. Multiplicity of the spectrum of Toeplitz operators, weighted cocycles, and the vectorial Riemann problem. (Russian) Zbl 0632.47023 Funkts. Anal. Prilozh. 21, No. 3, 1-10 (1987). Reviewer: V.Deundjak MSC: 47B35 47A10 30E25 PDFBibTeX XMLCite \textit{A. L. Vol'berg} and \textit{B. M. Solomyak}, Funkts. Anal. Prilozh. 21, No. 3, 1--10 (1987; Zbl 0632.47023)