Asymptotic distribution of eigenvalues of differential operators

by Serge Levendorskii.

Dordrecht : Kluwer Academic Publishers, ©1990.

Heat kernels and spectral theory

E.B. Davies.

Cambridge ; New York : Cambridge University Press, 1989.

Spectra of partial differential operators

by Martin Schechter.

2nd ed.

Amsterdam : North-Holland, 1986.

Sobolev spaces

Vladimir G. Maz'ja ; translated from the Russian by T. O. Saposnikova.

Berlin : Springer-Verlag, ©1985.

Green's functions

G.F. Roach.

2nd ed.

Cambridge [Cambridgeshire] ; New York : Cambridge University Press, 1982.

Inverse problems in quantum scattering theory

K. Chadan and P. C. Sabatier ; with a foreword by R. G. Newton.

New York : Springer-Verlag, ©1977.

Linear differential equations in Banach space

by S. G. Krein. [Translated from the Russian by J. M. Ganskin].

Providence, R.I. : American Mathematical Society, 1971 [©1972]

Expansions in eigenfunctions of selfadjoint operators

by Ju. M. Berezanskii. [Translated from the Russian by R. Bolstein and others].

Providence : American Mathematical Society, 1968.

Locally convex spaces and linear partial differential equations

François Treves.

New York : Springer-Verlag, 1967.

Direct methods of qualitative spectral analysis of singular differential operators

[by] I.M. Glazman. Translated from Russian by IPST Staff.

Jerusalem : Israel Program for Scientific Translations, 1965.