Nikolski, N. K. Treatise on the shift operator; spectral function theory By N. K. Nikolski with an appendix by S. V. Hurscev and V. V. Peller - Berlin Springer-Verlag 1986 - xi, 491p. Index, Bibl. - Grundlehren der Mathematischen Wissenschaften ; v.273 . "Tr. from the Russian by Jaak Peetre". Dewey Class. No.: 515.72 / N693.TS