Under CopyrightVornberger, OliverBauckhage, C.Ketterl, MarkusMarkusKetterl2022-03-0721.9.20172013https://publica.fraunhofer.de/handle/publica/28115110.24406/publica-fhg-281151en005006629Scalable multimedia learning. From local eLectures to global opencastdoctoral thesis