Real Analysis by N. L. Carothers

Signals and Systems: Analysis of Signals Through Linear Systems, Roberts, M.J.,

An Introduction to Fourier Analysis and Generalised Functions, M.J. Lighthill

METHODS OF HILBERT SPACES by KRZYSZTOF MAURIN (2nd Rev. Ed.)

An Introduction to Fourier Analysis and Generalised Functions

Classical and Modern Integration Theories by Ivan N. Pesin (1970, Hardcover)

Dover Books on Mathematics Ser.: Counterexamples in Analysis by John M. H....

Real and Abstract Analysis by K. Stromberg and E. Hewitt (1969, Hardcover)