Media type: E-Article Title: Relations between different types of spectra and spectral characterizations Contributor: Basit, Bolis; Günzler, Hans imprint: Springer Science and Business Media LLC, 2008 Published in: Semigroup Forum Language: English DOI: 10.1007/s00233-007-9042-4 ISSN: 1432-2137; 0037-1912 Keywords: Algebra and Number Theory Origination: Footnote: