1. M. S. Livshits, ?On the spectral decomposition of nonselfadjoint linear operators,? Mat. Sb., 34, 145?198 (1954).
2. V. T. Polyatskii, ?On the reduction of quasiunitary operators to triangular form,? Dokl. Akad. Nauk SSSR, 113, No. 4, 756?759 (1957).
3. R. L. Mogilevskaya, ?Triangular models of operators with slowly growing resolvents,? Teor. Funktsii, Funkts. Analiz Ikh Prilozhen.,27, 95?108 (1977).
4. B. S. Nagy and C. Foias, Harmonic Analysis of Operators on Hubert Space, North-Holland (1971).
5. Yu. P. Ginzburg and R. L. Mogilevskaya, ?On spectral functions of contractions with slowly growing resolvents,? Dokl. Akad. Nauk SSSR,207, No. 3, 517?520 (1972).