Anthony LaMarca Yatin Chawathe Sunny Consolvo Jeffrey Hightower Ian E. Smith James Scott Timothy Sohn James Howard Jeff Hughes Fred Potter Jason Tabert Pauline Powledge Gaetano Borriello Bill N. Schilit Place Lab: Device Positioning Using Radio Beacons in the Wild. 116-133 2005 conf/pervasive/2005 Pervasive http://dx.doi.org/10.1007/11428572_8 db/conf/pervasive/pervasive2005.html#LaMarcaCCHSSSHHPTPBS05