Daniela Fogli Andrea Marcante Piero Mussio Elisabetta Oliveri Marco Padula Rossella Scaioli uilding yard on line: a distributed and mobile system for supporting building workers. 195-200 2005 conf/wetice/2005 WETICE http://doi.ieeecomputersociety.org/10.1109/WETICE.2005.61 db/conf/wetice/wetice2005.html#FogliMMOPS05