Daniel Fitton Vasughi Sundramoorthy Gerd Kortuem James Brown Christos Efstratiou Joe Finney Nigel Davies Exploring the Design of Pay-Per-Use Objects in the Construction Domain. 192-205 2008 EuroSSC http://dx.doi.org/10.1007/978-3-540-88793-5_15 conf/eurossc/2008 db/conf/eurossc/eurossc2008.html#FittonSKBEFD08