Use CellSpotting to find information for the place you are at!, and even better you can help and give information to others about places you know! CellSpotting is a Collaborate Location Based service built by its users.
L. Ronga, T. Pecorella, E. Del Re, и R. Fantacci. Proceedings of the International Workshop of COST Actions 272 and 280, Satellite Communications - From Fade Mitigation to Service Provision, стр. 295--302. (мая 2003)