Sigal Louchheim Petra Langwald Judy Ossello Applying Usage Models to Innovate Information Technology Solutions. 83-96 2008 Open IT-Based Innovation http://dx.doi.org/10.1007/978-0-387-87503-3_5 conf/ifip8-6/2008 db/conf/ifip8-6/ifip8-6-2008.html#LouchheimLO08