Gatica-Perez, DanielLaurila, Juha K.Blom, Jan2014-01-092014-01-092014-01-09201310.1016/j.pmcj.2013.10.001https://infoscience.epfl.ch/handle/20.500.14299/99236WOS:000327782000001Special Issue on the Mobile Data Challengetext::journal::journal article::research article