Fischer, IsabelIsabelFischer0000-0002-7986-8405Papert, MarcelMarcelPapert0000-0001-6176-298XLeischnig, AlexanderAlexanderLeischnigProckl, GünterGünterProckl2026-02-112026-02-1120260040-1625https://fis.uni-bamberg.de/handle/uniba/113084engAn activity system perspective on smart product service systemsarticle10.1016/j.techfore.2026.124557