@inproceedings{SBHJ03,
 author    = {Naouel Ben Salem and Levente Butty\&\#225;n and Jean-Pierre Hubaux and Markus Jakobsson},
 title     = {A charging and rewarding scheme for packet forwarding in multi-hop cellular networks},
 booktitle = {MobiHoc '03: Proceedings of the 4th ACM international symposium on Mobile ad hoc networking \& computing},
 year      = {2003},
 isbn      = {1-58113-684-6},
 pages     = {13--24},
 location  = {Annapolis, Maryland, USA},
 doi       = {http://doi.acm.org/10.1145/778415.778418},
 publisher = {ACM Press},
 address   = {New York, NY, USA},
 }