@book{UBHD-1025180, title={Spectral theory, self adjoint operators in Hilbert space}, edition={2. print.}, publisher={Interscience Publ.}, address={New York}, year={1964}, pages={IX, S. 859 - 1923}, language={eng}, isbn={0-470-22638-2 and 978-0-470-22638-4}, number={ARRAY(0x55d9c2831078)}, series={Pure and applied mathematics}, library={UB [Signatur: 2002 C 1906::2] ; MA [Signatur: Dunfo::2]}, }