Free and open source software for e-learning : issues, successes, and challenges 2026-02-15T17:04:34+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Ozkan Czerkawski, Betul, 1969- (Information Science Reference, 2011)