Moira C. Norrie Beat Signer Nadir Weibel Interactive Paper as a Reading Medium in Digital Libraries. 232-243 2008 ECDL http://dx.doi.org/10.1007/978-3-540-87599-4_24 conf/ercimdl/2008 db/conf/ercimdl/ecdl2008.html#NorrieSW08