Signals and systems 2026-02-15T21:23:48+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Oppenheim, Alan V., 1937-; Willsky, Alan S.; Hamid, Syed Abdul