Digital signal processing 2026-02-15T12:57:58+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Proakis, John G.; Manolakis, Dimitris G. (Pearson Prentice Hall, 2007)