Davies, E. (1996). Spectral theory and differential: Operators. U. Pr.
Cita Chicago (17th ed.)Davies, E.B. Spectral Theory and Differential: Operators. Cambridge: U. Pr, 1996.
Cita MLA (9th ed.)Davies, E.B. Spectral Theory and Differential: Operators. U. Pr, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.