Ulrich Bretschneider Michael Huber Jan Marco Leimeister Helmut Krcmar Community for Innovations: Developing an Integrated Concept for Open Innovation. 503-510 2008 Open IT-Based Innovation http://dx.doi.org/10.1007/978-0-387-87503-3_28 conf/ifip8-6/2008 db/conf/ifip8-6/ifip8-6-2008.html#BretschneiderHLK08