Helmberg, G., & Helmberg, G. (1975). Introduction to spectral theory in Hilbert space. Amsterdam: North Holland.
Chicago Style CitationHelmberg, Gilbert, and Gilbert Helmberg. Introduction to Spectral Theory in Hilbert Space. Amsterdam: North Holland, 1975.
MLA CitationHelmberg, Gilbert, and Gilbert Helmberg. Introduction to Spectral Theory in Hilbert Space. Amsterdam: North Holland, 1975.
Warning: These citations may not always be 100% accurate.