Daniele Riboni Claudio Bettini Differentially-private release of check-in data for venue recommendation. 190-198 2014 PerCom https://doi.org/10.1109/PerCom.2014.6813960 https://doi.ieeecomputersociety.org/10.1109/PerCom.2014.6813960 conf/percom/2014 db/conf/percom/percom2014.html#RiboniB14