An introduction to nonlinear analysis : theory 2026-02-16T14:21:47+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Denkowski, Zdzisaw, 1940-; Migorski, Stanisaw, 1961-; Papageorgiou, Nikolaos Socrates (Kluwer Academic Publishers, 2003)