Laurynas Siksnys Jeppe R. Thomsen Simonas Saltenis Man Lung Yiu Ove Andersen A Location Privacy Aware Friend Locator. 405-410 2009 SSTD http://dx.doi.org/10.1007/978-3-642-02982-0_29 conf/ssd/2009 db/conf/ssd/sstd2009.html#SiksnysTSYA09