References
- Burnap , C. and Zweifel , P. F. 1986 . A Note on the Spectral Theorem . Integral Equations and Operator Theory , 9 : 305 – 324 .
- Dunford , N. and Schwartz , J. 1971 . Linear Operators , New York : Part III Wiley-Interscience .
- Case , K. M. and Zweifel , P. F. 1967 . Linear Transport Theory , 10 – 3 . MA : Addison-Wesley . Reading
- Van Casteren , J, A. 1983 . Operators Similar to Unitary or Selfadjoint Ones . Pac. J. Math , 104 : 241 – 255 .
- Stone , M. H. 1958 . Linear Transformations in Hilbert Sioace . Amer. Math. Soe , 104 : 357 – 357 .