Retherford, J. (1993). Hilbert Space: Compact operators. University.
Cita Chicago (17th ed.)Retherford, J.R. Hilbert Space: Compact Operators. Cambridge: University, 1993.
Cita MLA (9th ed.)Retherford, J.R. Hilbert Space: Compact Operators. University, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.