%0 Conference Paper %1 ls_leimeister %A Bitzer, Philipp %A Weiß, Frank %A Leimeister, Jan Marco %B Eighth International Conference on Design Science Research in Information Systems and Technology (DESRIST) %C Helsinki, Finland (accepted for publication) %D 2013 %K delivery itegpub learning mediated model productivity pub_jml pub_pbi reference service technology %T Towards a Reference Model for a Productivity-optimized Delivery of Technology Mediated