Private proximity detection and monitoring with vicinity regions. - Xin Lin 001; Haibo Hu 001; Hong Ping Li; Jianliang Xu; Byron Choi (MobiDE, 2013)

Nearby Friend Alert: Location Anonymity in Mobile Geosocial Networks. - Hong Ping Li; Haibo Hu 001; Jianliang Xu (IEEE Pervasive Comput., 2013)